My Two Wicks Are Too Close Together and Create One Extremely Hot Central Melt Pool — Can Spacing Alone Fix the Problem?

My Two Wicks Are Too Close Together and Create One Extremely Hot Central Melt Pool — Can Spacing Alone Fix the Problem?

 

Eco C2 ₹188.80 for 20 · every C2 pack in stock Wick stickers ₹100.00 for 40 · 100-sheet out of stock Dark Vanilla 100 g ₹790.00 · every size in stock
Two wicks · too close · one hot central pool
Move the heat before you cut it: a spacing-only ladder shows which fault you have.
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Eco Candle Wicks
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Dark Vanilla Fragrance
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"Good one"
Sneha TamangVerified buyer · Apr 2025
Premium Candle Wicking Needle
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"This needle is very helpful as it doesn’t damage the mould and there is no leakage of wax while pouring.. I would definitely recommend this .."
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Luxury Soy Wax Chunks for Jar / Container Candles
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"Soy wax quality is the best, which ever products ordered were properly packed and delivered as early as possible, timely response to the inquiries. Good service"
Jaya SawlaniVerified buyer · Nov 2025
Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles
★★★★☆
"Good quality .... if possible delivery date would be try little bit quick please"
Subhankar RoyVerified buyer · Sep 2024
Eco Candle Wicks
★★★★★
"One of the best fragrance oils"
AnonymousVerified buyer · Jul 2025
Dark Vanilla Fragrance
★★★★★
"Good one"
Sneha TamangVerified buyer · Apr 2025
Premium Candle Wicking Needle
★★★★★
"This needle is very helpful as it doesn’t damage the mould and there is no leakage of wax while pouring.. I would definitely recommend this .."
LJAug 2024
Premium Candle Wicking Needle
★★★★★
"All the products are so good"
Jinal PatelVerified buyer · May 2025
Luxury Soy Wax Chunks for Jar / Container Candles
★★★★★
"Soy wax quality is the best, which ever products ordered were properly packed and delivered as early as possible, timely response to the inquiries. Good service"
Jaya SawlaniVerified buyer · Nov 2025
Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles
Reviews collected and published through Judge.me on candlemakingsuppliesindia.store. They are general reviews of the products named on each card, not assessments of the advice set out below. Wording is unedited.
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✓ Prices verified 29 September 2026, stock checked per size ✓ MSDS and IFRA documentation on request on WhatsApp ✓ Raw materials only — CSI does not sell finished candles
CSI Wick Lab · Double Wicks
Two wicks crowded together often make one hot central pool. Move the same pair apart in two small steps before touching the size: if the centre calms and the edges hold, spacing was the problem.
3 spacings
the same pair, two candles each · CSI live pricing, September 2026
Quick answers — read this first
My two wicks are too close together and make one very hot central pool. Can spacing alone fix it? Sometimes. If the pair is the right size and simply crowded, moving the wicks apart spreads the heat and the centre calms down. If the pair is too big, moving it apart only moves the heat around. A short ladder tells you which: the same two wicks at three spacings, two candles each.

What does "spacing fixed it" look like? At one rung, the depth at the midpoint falls to about 1 cm or less, the two flames stand apart and upright, and the pool still reaches the glass all round by the third burn.

And "the pair is too big"? The centre cools a little as the wicks part, but the flames stay tall or build carbon at every rung. Then the fix is a smaller pair, not a wider one. A third reading, where the centre cools but the side walls stop melting, means spacing trades one fault for another.

What does the ladder cost? Six 300 g candles at 8% (worked example): 144 g of oil, 1,656 g of wax, 12 C2 wicks and twelve stickers, ₹2,134.33 of materials, your own jars not included.
The short answer
The verdict: test spacing on its own before touching size. Same wicks, three spacings, two candles each; read centre heat and edge reach together.
The rungs (worked example): your current 2.5 cm, then 3.5 cm and 4.5 cm in a jar measured 9 cm outside (8.3 cm inside). Each step moves each wick 5 mm further from the middle and 5 mm closer to the glass along the line.
The rule: centre heat falls and edges hold = spacing fixes it; flames stay tall or carbon at every rung = the pair is too big; centre cools but side walls ring = spacing can't do both.
The honest limit: C2 is CSI's larger tabbed Eco wick and there is no sized, tabbed wick between C1 and C2; if spacing can't fix it, the next step is a smaller pair, not an in-between size.
Shop: Eco Candle Wicks C2 · Candle Wick Stickers (40) · Dark Vanilla · CSI 464 · all candle wicks
In this guide
Can spacing alone fix a hot centre? Three ways a ladder reads Worked example, not CSI data: two C2 wicks, jar measured 9 cm outside (83 mm inside), 300 g at 8% Dark Vanilla. Each path joins the same pair at 2.5, 3.5 and 4.5 cm apart (two candles each, burn 3). Target box and thresholds are our judgement. TARGET HOT CENTRE and short edges EDGES STALL HOT CENTRE 0 2 4 6 8 10 12 14 16 18 20 22 0 1 2 3 4 5 6 Depth at the midpoint between the wicks at 3 h, mm (hotter centre →) Widest ring left at the glass, mm A 2.5 A 3.5 A 4.5 B 2.5 B 3.5 B 4.5 C 2.5 C 3.5 C 4.5 A · spacing fixes it: centre depth falls into range at 3.5 cm and the edges still reach the glass. Stop there. B · pair too big: centre cools only a little, flames stay tall with carbon at every rung. Step the pair down. C · edges stall: the centre cools, but the short-axis walls ring as the wicks part. Spacing trades one fault for another.
Each path is one pair of wicks at three spacings, plotted by what matters: how deep the middle gets (across) and how much wax is left at the glass (up). Only path A passes through the target, so only A is a case where spacing alone fixes the hot centre. B never gets the centre into range because the flames themselves are too big; C cools the centre by giving up the side walls. All readings are a worked example, not CSI data; the thresholds are our judgement.
The same pair, three times · C2 ₹188.80 for 20
Eco Candle Wicks C2: a spacing ladder keeps the wick identical
Every rung at its spacing · ₹100.00 for 40
Candle Wick Stickers: tabs stay on their marks while you pour
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Straight answer
My two wicks are too close together and create one extremely hot central melt pool. Can spacing alone fix the problem?
It can, if the wicks are the right size for the jar and simply crowded; it can't if the pair is too big. Don't guess which: run a spacing-only ladder. Keep the wicks, oil, load, wax, fill, cure and room exactly as they are, and pour two candles at each of three spacings: your current one and two steps wider, each step moving each wick 5 mm further from the middle (in a jar measured 9 cm outside, 2.5, 3.5 and 4.5 cm apart). At 3 hours in burn 3, read two things: the depth at the midpoint between the wicks and the ring left at the glass at four points. Spacing fixes it when one rung brings the midpoint depth to about 1 cm or less with calm, separate flames and the pool still meets the glass all round; keep the inner-most rung that does. The pair is too big when the centre barely cools and the flames stay tall or build carbon at every rung; step down to a smaller pair. Spacing can't do both when the centre cools but the side walls start to ring as the wicks part. Whatever passes still has to survive a full life to about 1 cm left.
One line: move the same pair apart in two 5 mm steps; if centre heat falls and edges hold, spacing was the fault; if the flames stay big, the pair was.
For the ladder: Eco C2, the 20-pack at ₹188.80 (six pairs need twelve; the 10-pack is two short), and wick stickers, 40 for ₹100.00. If you already own the oil, wax and jars, that is ₹288.80 for the whole test.
Eco C2 20 — ₹188.80

What crowding does to two flames

Two flames 2.5 cm apart behave less like a pair and more like one wide flame with two wicks.

A pair of wicks is meant to split a wide pool into two halves, each served by its own flame. When the wicks sit close together, both flames heat the same small patch of wax between them. Their pools meet early, merge into one, and the middle, heated from both sides at once, commonly becomes the deepest and hottest part of the candle. Makers often see the two flames lean toward each other, as the air each one draws in meets in the narrow gap between them, and sometimes touch or merge into one taller, flickering flame. These are tendencies, commonly reported, not measured CSI data, but they explain the symptom in your title: one hot central pool rather than two working halves.

Meanwhile the walls are far away. In a jar measured 9 cm outside (8.3 cm inside on an assumed 0.35 cm wall), a pair 2.5 cm apart sits 2.90 cm from the glass along its own line and 4.33 cm from the walls at right angles to it. Each wick serves 27.05 cm² in principle; crowded together, they serve the middle of the 54.11 cm² pool twice and the edges barely at all. So a crowded pair can give you a hot centre and a ring at the glass at the same time, which is why "make the wicks bigger" is the wrong reflex.

Watch the flames, not the glass, for heat. A merged or leaning flame, a pool much deeper in the middle than at the edge, carbon building on the inner sides of both wicks and soot on the glass are the observations this page uses. Never judge heat by touching the jar. If you want a number, use a non-contact thermometer (CSI does not list one) aimed at the same spot every time. What two wicks do to the glass itself, and whether the jar or the configuration should change, is the two-wick glass heat post.

Why "spacing alone?" is the right first question: it is the only change that keeps the heat input the same. Move the wicks apart and the flames are the same size, drawing the same fuel; only where their heat lands changes. So if the centre calms and the edges still melt, you have shown the heat was fine and the placement wasn't. If the flames stay tall and sooty wherever you put them, you have shown the opposite, with the same six candles.

Three rungs, and what each step trades

Every 5 mm you gain in the middle, you give up at the ends of the wick line.

The ladder moves each wick 5 mm outward per rung, so the spacing grows by 1 cm. Your current spacing is rung 1; in the worked example that is 2.5 cm. If yours is different, start from yours and add 1 cm per rung. Here is what the geometry does (declared; geometry, not a burn prediction):

Ladder geometry · 8.3 cm inside (jar measured 9 cm outside)
Wick to midpoint = s/2 · to the glass along the line = r − s/2 · to the walls at right angles = √(r² + (s/2)²)
Spacing s Each wick to the midpoint Each wick to the glass along the line Each wick to the walls at right angles
2.5 cm (your current) 1.25 cm 2.90 cm 4.33 cm
3.5 cm 1.75 cm 2.40 cm 4.50 cm
4.5 cm 2.25 cm 1.90 cm 4.72 cm

From 2.5 to 4.5 cm, each wick moves 10 mm further from the middle: that is what cools the centre. It also comes 10 mm closer to the glass along its line, and, less obviously, 3.9 mm further from the walls at right angles to the line. That last number is why path C in the diagram exists: parting the wicks helps the ends of the wick line and slightly hurts the sides. Three rungs is enough to see a direction; the top rung here, 4.5 cm, is already a little past the halfway spacing (s = r, 4.15 cm) that the 9 cm setup drawing uses as a starting point, and we would not go wider in a first ladder. How close to the glass is too close is tested in the wall-gap trade, not here.

Why not one big jump?
Moving straight from 2.5 to 4.5 cm tells you whether the end point is better, not where the change happened. The middle rung is what separates path A (fixed at 3.5 cm, keep it) from path C (the centre only cools once the side walls are already ringing). One extra pair of candles buys that distinction.

Running the spacing-only ladder

Change the spacing and nothing else. Not the trim, not the room, not the oil.
1
Measure the inside and mark three templates.Rim, middle and base. On card, a line through the centre with marks at ±12.5, ±17.5 and ±22.5 mm. Code the bases S25-a/b, S35-a/b and S45-a/b.
2
Same wicks everywhere.Twelve C2 from one pack, a sticker under every tab, a bar across the rim for each jar with holes at that rung's spacing.
3
One batch, one pour.144 g of Dark Vanilla into 1,656 g of CSI 464 (1,800 g at 8% of total weight), mixed well within the wax page's pour range (80–90°C), six 300 g candles of 24 g oil and 276 g wax each.
4
Check spacing in the set wax.Measure centre-to-centre at the surface; a candle more than about 2 mm off its rung is off-spec (our tolerance).
5
Cure alike.The Dark Vanilla page says at least 48–72 hours before burn testing; many makers wait about a week for a vanilla. Same days for all six.
6
Burn three sessions of about 3 hours, all six together.Still air, wicks trimmed to the same length (about 5–6 mm is common practice), fully cooled between. The rough one-hour-per-2.5 cm rule gives about 3.3 hours for this width; 3 hours is the check point.
What to log · per candle, burns 2 and 3
No temperatures needed; depth, flame and ring are the readings
Check Record Why
1 h Midpoint depth; flame lean (none / slight / touching); flame heights Whether the two pools have merged yet
2 h Midpoint depth; depth about 1 cm from the glass on the wick line; flame lean Where the deepest point sits: middle, or under each wick
3 h Midpoint depth; ring at N, E, S and W (mm, 0 = pool touches the glass); carbon on each wick; soot Centre heat and edge reach, the two numbers the rule uses

Take depth with a marked skewer dipped straight down at the midpoint, the same way every time, keeping clear of both flames. Read the ring from a photo taken directly above with a ruler across the rim, at N, E, S and W, with the wick line running E–W so that N and S are the short-axis walls. Burn within sight, and stop any candle whose flames merge into one tall flame or start to soot heavily; that is a result, not a failure of the test.

Mistake: fixing the trim while running the ladder. What happens: a close pair that carbons is tempting to trim harder at the tight rung; then the tight rung reads cooler because of the trim, not the spacing. Fix: one trim length for every wick, every session, written in the log. If a tight-rung candle needs extra trimming to stay safe, record that as its result.

Four ways the ladder can read

The same six candles answer "can spacing fix it?" with yes, no, or "not on its own".
Decision rule · both candles of a rung must agree · our judgement
"Centre in range" = midpoint depth about 1 cm or less at 3 h · "edges hold" = ring 1 mm or less at N, E, S and W by burn 3 · flame range about 2.5–5 cm (rule of thumb)
Reading What you see What to do
A · spacing fixes it At one rung the midpoint depth is about 1 cm or less, the flames stand apart and upright, and the pool still meets the glass all round by burn 3 Keep that rung (the inner-most one that passes). Full life on it. Nothing new to buy
B · pair too big The centre cools only a little as the wicks part; the trimmed flames stay tall (above about 5 cm) or carbon at every rung Spacing is moving the heat, not reducing it. Step the pair down (2 × C1) at the middle rung
C · edges stall The centre cools, but the short-axis walls (at right angles to the wicks) start to ring as the wicks part, and no rung does both Spacing alone can't give you both. Take the middle rung into a size test, or read the in-between options
No change at any rung Depth and flames the same at 2.5, 3.5 and 4.5 cm Spacing isn't the cause. Check trim, room temperature and load before anything else

A · Spacing fixes it

In the worked example the midpoint depth goes from 18 mm at 2.5 cm to 9 mm at 3.5 cm with the glass still wet all round: the pair was the right size and simply crowded. Keep 3.5 cm, not 4.5 cm, even if 4.5 cm also passes: the inner-most passing rung keeps the flames furthest from the glass, which matters more lower in the jar. Then run that build through its full life. Argued against our own interest: the fix cost nothing but a new template; the wicks you already had were right.

B · The pair is too big

The centre cools a little with each rung, but the trimmed flames stay above about 5 cm, carbon builds on both wicks, and the glass picks up soot, at every spacing. That is the signature of too much fuel in each flame, and no position fixes a flame's own size. Step the pair down, 2 × C2 to 2 × C1, at the middle spacing, two candles against two of your current pair. If you want to confirm first that each wick on its own is too big (rather than the two together), lighting one wick alone for an hour is the single-lit diagnostic. With heavy vanilla oils this reading is common enough that we'd expect it more often than with a light floral, as a tendency.

C · The centre cools but the edges stall

The middle comes into range only at the wider rungs, and by then the short-axis walls are carrying a ring that wasn't there at 2.5 cm. The geometry table explains part of it: parting the wicks moves them 3.9 mm further from those walls. Spacing is trading one fault for another, so it can't be the whole answer. Take the middle rung into a size test, or, if C1 is too small and C2 too big at every spacing, read the honest options in the in-between wick post; CSI has no sized, tabbed wick between the two. A ring on the short axis with a centre that is fine is also what a pair looks like when a strip is left between the wicks from the other direction: the inward repositioning ladder is that case.

No change at any rung means spacing isn't your problem. Before changing anything else, check that the trim was the same, that the room was not hotter on the day (an Indian summer room, roughly April–June, can deepen any pool), and that the load is where you think it is. If a pool that was fine at the top goes deep only in the lower half, that's a late-life question, not a spacing one.

Grams, wicks and rupees for the ladder

Six candles, one wick pack, one sheet of stickers. The oil is the expensive part.

Materials consumed by the six candles: 144 g of Dark Vanilla (₹1,150.80, all of a 100 g bottle and 44 g of a 50 g), 1,656 g of CSI 464 (₹840.25), 12 C2 (₹113.28) and twelve stickers (₹30.00): ₹2,134.33, jars not included. From nothing, the cash is ₹2,503.60: Dark Vanilla 100 g and 50 g (₹1,200.00, leaving 6 g), two 1 kg bags of CSI 464 (₹1,014.80, leaving 344 g), a C2 20-pack and a sticker sheet. If you own the oil, wax and jars already, it is ₹288.80.

Per candle, at the 100 g oil price: ₹353.52, of which the oil is ₹189.60 (54%), the wax ₹140.04, the C2 pair ₹18.88 and the stickers ₹5.00. A follow-up of two candles after reading B or C needs another 48 g of oil, more than the 6 g left, so plan for a second bottle; two 100 g bottles (₹1,580.00) instead of 100 g + 50 g would leave enough for it. All figures exclude labour, freight, packaging and GST.

Diwali is 8 November 2026, 40 days from 29 September 2026. Pour the ladder this week, cure about a week, and three sessions give you a reading by mid-October; the full life on the winning rung needs the weeks after. Send us your candle count for a quote on Eco C2, stickers, Dark Vanilla and CSI 464 with a GST invoice and a dispatch date.
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What to buy, and what to skip

Five items, chosen on page statements, price and stock on 29 September 2026. CSI publishes no wick-performance data, so nothing here is ranked on burn results. Oil candles are counted at 24 g (300 g fill) and 12 g (150 g).

1
wick · the pair you already have, three times over
Eco Candle Wicks — Thick (C2)
A spacing-only ladder keeps the wicks identical, so you buy more of what you are already using. Six candles take 12 C2; the 10-pack is two short, so the 20-pack is the buy, with 8 spare for a two-candle follow-up. The page states no size or jar range in the text we captured. Argued against our own interest: if the ladder reads "pair too big", the next purchase is the cheaper C1 20-pack (₹118.00), and the pair costs ₹7.08 less per candle; if it reads "spacing fixes it", you needed wicks only for the test.
Pack Price Per unit What it covers here
Thick (C2) / 10 ₹94.40 ₹9.44 five pairs, one short of the ladder
Thick (C2) / 20 ₹188.80 ₹9.44 all six pairs (12 wicks), 8 spare for a follow-up
Thick (C2) / 50 · 100 · 500 · 1000 ₹472.00 · ₹944.00 · ₹4,720.00 · ₹9,440.00 ₹9.44 production, after the full life
Thin (C1) / 10 ₹59.00 — Out of stock ₹5.90 Out of stock on 29 September 2026
Thin (C1) / 20 ₹118.00 ₹5.90 only if the ladder says the pair is too big
The ladder: ₹113.28 in wicks. Buy C2 20 — ₹188.80
2
fixing · keeps each rung at its spacing
Candle Wick Stickers (40)
A ladder is only as good as the spacings you actually got. The page describes "10mm Candle Wick Round Stickers" that go "to the bottom of your wick before pouring the wax"; one under every tab keeps each pair on its marks while the wax goes in. Stock on 29 September 2026: the 40-sticker sheet is in stock; the 100-sticker sheet is out of stock.
Pack Price Per unit What it covers here
1 sheet · 40 stickers (10 mm) ₹100.00 ₹2.50 twelve tabs, 28 spare
1 sheet · 100 stickers ₹236.00 — Out of stock ₹2.36 Out of stock on 29 September 2026
The ladder: ₹30.00 of stickers. Buy 40 — ₹100.00
3
fragrance oil · vanilla gourmand · the worked example's oil
Dark Vanilla Fragrance
The worked example's oil, and the kind of oil that makes this question sharper: heavy, vanilla-rich gourmands are commonly linked to more carbon on the wick and taller, sootier flames (a tendency, not CSI data), so a close pair burning one can run hot faster than a light floral would. The page lists "rich vanilla and spice opening into deep caramel and cream, settling into dark amber and warm musk", "candles (6-10%)", "Vanillin present - note for light-coloured wax" and "Always cure soy wax candles for at least 48-72 hours before burn testing for best throw." Argued against our own interest: at ₹7.90 a gram (100 g) it is the dearest line in the ladder, 54% of each candle's materials; a 100 g and a 50 g (₹1,200.00) cover six candles with 6 g left, so don't buy the 500 g for a test. Test in your production oil, whatever it is.
Size Price Per gram 300 g candles at 8% (24 g) 150 g candles at 8%
15 g ₹130.00 ₹8.67 none (under 24 g) 1
50 g ₹410.00 ₹8.20 2 4
100 g ₹790.00 ₹7.90 4 8
500 g ₹3,840.00 ₹7.68 20 41
1 kg ₹7,646.00 ₹7.65 41 83
Six candles: 144 g = ₹1,150.80. Buy 100 g — ₹790.00
4
wax · held constant across the ladder
Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles
The page states "Fragrance Load Up to 10%" and "Pour Temperature 80°C – 90°C". Dark Vanilla at 8% sits inside both the oil page's 6–10% and this ceiling. All six candles from one bag: a wax change moves pool depth on its own. Flat ₹0.51 a gram from 1 kg up.
Pack Price Per unit What it covers here
500 g ₹260.00 ₹0.52 per g one candle short of two
1 kg ₹507.40 ₹0.51 per g two bags cover the six (1,656 g), 344 g left
5 kg ₹2,537.00 ₹0.51 per g the same per gram; for the full-life candles too
10 kg ₹5,074.00 ₹0.51 per g production
Six candles: 1,656 g = ₹840.25. Buy 1 kg — ₹507.40
5
tool · listed for wicking, not needed here
Premium Candle Wicking Needle
Listed as a tool "for flawless wicking of your candles"; the page doesn't say which kind of candle, and the review on it mentions moulds. For a container ladder with pre-tabbed wicks, stickers and a card bar, you don't need it. Argued against our own interest: skip it for this test; it earns its place if you also pour pillars or need to thread wick through a mould.
Pack Price Per unit What it covers here
Single needle ₹472.00 ₹472.00 not needed for this ladder
Optional; not part of the ladder. Buy — ₹472.00

Skip: Cotton Braided pairs as "stronger wicks" to push the edges; a hot centre is a heat-placement problem, and bigger wicks add heat. Skip a third wick for now; three wicks in a round jar is a triangle problem with its own geometry (three small wicks, hot centre). And skip C1 until the ladder says "pair too big".

The CSI principle
Move the heat before you cut it.
A spacing-only ladder keeps the flames the same and changes only where they land. If that fixes the centre without losing the edges, the wicks were never the problem.
"Two wicks too close is one problem wearing two hats. Pull them apart before you blame either."
— CandleMakingSuppliesIndia
Why trust this guide

CandleMakingSuppliesIndia sells the wicks, stickers, oil, wax and tools named here, and does not sell finished candles. This page still says the fix may cost nothing, that our wicking needle isn't needed for this test, and that our range has no sized, tabbed wick between C1 and C2.

Every price was verified on CSI's live store on 29 September 2026. Stock was checked per size: the Eco C1 10-pack and the 100-sticker sheet are out of stock on that date and are flagged wherever they appear; every other size shown is in stock. Oil, wax and sticker wording is quoted from the product pages; where a page is silent in the text we captured, we say so.

The ladder, the four readings, the thresholds and every depth and ring figure are our judgement or worked-example illustrations; the 0.35 cm wall, 300 g fill and spacings are worked-example inputs; depth (about 0.5–1 cm), flame (about 2.5–5 cm) and trim figures are commonly cited rules of thumb. CSI publishes no wick-performance data. For bulk pricing, GST invoicing, and MSDS and IFRA documentation on request, message us on WhatsApp at +91 7397976926.

Frequently asked questions

What happens if double wicks are too close together?
Commonly, both flames heat the same patch between them, the pools merge early and the middle becomes the deepest, hottest part of the candle; the flames may lean together. The edges can still be left short at the same time.
How do I know if my wicks are too big or just too close?
Move the same wicks apart in 5 mm steps per wick, two candles per spacing. If the centre calms and the edges still melt, spacing was the fault. If the flames stay tall or carbon at every spacing, the wicks are too big.
Should I move my wicks closer to the glass to fix a hot centre?
Only in small steps, and only as a test. Moving them apart cools the middle but brings each flame closer to the glass along its line and slightly further from the side walls. Keep the inner-most spacing that fixes the centre.
Why do my two candle flames lean towards each other?
Close flames commonly draw air from the same narrow gap and can lean in or merge. It is one of the signs a pair is crowded; a spacing ladder shows whether parting them stops it.
Can vanilla fragrance make a double-wick candle burn hotter?
Heavy vanilla-rich oils are commonly linked to more carbon and taller, sootier flames, which can make a crowded pair worse. Test the spacing in your production oil so the result applies to it.
How many spacings should I test?
Three is a practical minimum: your current spacing and two steps wider. The middle rung is what tells a clean spacing fix from a case where the centre only cools once the side walls stop melting.
Before you change the wick size
Run the same pair at three spacings; let centre and edges decide.
Two candles each at your spacing and two 5 mm steps wider per wick. Centre in range with edges holding: keep that rung. Flames big everywhere: a smaller pair. Centre cools, edges stall: a size test at the middle rung. Send us your ladder log on WhatsApp.
Shop Eco C2 wicks Send your ladder log on WhatsApp
Continue the read — 8.5–9 cm wide jars
Editorial standards & sources
About this guide: part of CSI's cluster on 8.5–9 cm jars (4241–4260). It owns the spacing-only ladder for a pair that makes one hot central pool: the same wicks at three spacings, two candles each, read for centre heat and edge reach, with the rule for when spacing fixes it and when the pair is simply too big. It links rather than repeats initial placement (4252), the strip-between-wicks ladder (4245) and the single-lit test (4244).

Customer reviews: The six reviews at the top of this page are genuine, published Judge.me reviews left by CSI customers on the product pages named on each card — Dark Vanilla Fragrance, Eco Candle Wicks, Luxury Soy Wax CSI 464 (Flakes Form) For Container Candles, Luxury Soy Wax Chunks for Jar / Container Candles, Premium Candle Wicking Needle. They are general product reviews, not assessments of the wick advice on this page. Names, star ratings, dates and products are as recorded by Judge.me and wording is unedited. "Verified buyer" appears only on reviews Judge.me recorded as verified — Subhankar Roy, Anonymous, Sneha Tamang, Jinal Patel, Jaya Sawlani. The reviews from LJ are published but not recorded as verified, and carry no badge. Reviews below five stars are included as published, not filtered out.

Figures verified 29 September 2026, CSI live pricing: Eco Candle Wicks Thick (C2) 10 ₹94.40, 20 ₹188.80, 50 ₹472.00, 100 ₹944.00, 500 ₹4,720.00, 1,000 ₹9,440.00; Thin (C1) 10 ₹59.00 (out of stock), 20 ₹118.00; Candle Wick Stickers 40 ₹100.00, 100 ₹236.00 (out of stock); Premium Candle Wicking Needle ₹472.00; Dark Vanilla Fragrance 15 g ₹130.00 (₹8.67/g), 50 g ₹410.00 (₹8.20/g), 100 g ₹790.00 (₹7.90/g), 500 g ₹3,840.00 (₹7.68/g), 1 kg ₹7,646.00 (₹7.65/g); Luxury Soy Wax CSI 464 500 g ₹260.00, 1 kg ₹507.40, 5 kg ₹2,537.00, 10 kg ₹5,074.00; Cotton Braided Wicks Ready Made 10 ₹120.00. Every other size listed is in stock on 29 September 2026. Per unit = price ÷ grams or units, two decimals.

Non-price figures: load is a percentage of total candle weight (300 g at 8% = 24 g oil + 276 g wax; the standard 150 g candle at 8% = 12 g). The 9 cm outside, 0.35 cm wall, 300 g fill and 2.5/3.5/4.5 cm rungs are worked-example inputs; wick-to-midpoint = s/2, wick-to-wall along the line = r − s/2, to the walls at right angles = √(r² + (s/2)²), all on the inside radius (geometry, not burn predictions). Ceilings are as the pages state (CSI 464 up to 10%, pour 80–90°C; Dark Vanilla 6–10%): formulation limits, not regulatory ones. Depth (about 0.5–1 cm), flame height (about 2.5–5 cm), trim (about 5–6 mm) and session length (about an hour per 2.5 cm) are commonly cited rules of thumb. The ladder readings, target box, 2 mm tolerance and decision rule are editorial judgement and illustrative. Costs exclude labour, freight, packaging and GST. Diwali 8 November 2026 is a calendar fact.
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