3,000 gallon pool: how much of each chemical
For a 3,000-gallon pool, 3.1 fl oz (about 6 tablespoons) of 12.5% liquid chlorine raises free chlorine by 1 ppm.
Always follow your product’s label directions. Pool and spa chlorine, bromine, shock and algaecides are EPA-registered pesticides: use products labeled for pool or spa use, and don’t swim or soak until levels are within the limit on your product’s label. If this page and a label disagree, the label wins.
| Product | +1 ppm FC | +2 ppm FC | +5 ppm FC | +10 ppm FC |
|---|---|---|---|---|
| Pool liquid chlorine 12.5% | 3.1 fl oz91 mL | 6.1 fl oz182 mL | 15 fl oz454 mL | 31 fl oz908 mL |
| Pool liquid chlorine 10% | 3.8 fl oz114 mL | 7.7 fl oz227 mL | 19 fl oz568 mL | 38 fl oz1.14 L |
| Household bleach 6% | 6.2 fl oz183 mL | 12 fl oz366 mL | 31 fl oz914 mL | 62 fl oz1.83 L |
| Household bleach 8.25% | 4.3 fl oz129 mL | 8.7 fl oz257 mL | 22 fl oz643 mL | 43 fl oz1.29 L |
| Cal-hypo 65% | 0.6 oz17 g | 1.2 oz35 g | 3.1 oz87 g | 6.2 oz175 g |
| Dichlor 56% | 0.7 oz20 g | 1.4 oz41 g | 3.6 oz101 g | 7.2 oz203 g |
| Trichlor 90% | 0.45 oz13 g | 0.9 oz25 g | 2.2 oz63 g | 4.5 oz126 g |
Liquid chlorine percent is the trade percent on pool chlorine jugs; bleach percent is by weight. Cal-hypo adds calcium. Dichlor and trichlor add stabilizer (CYA). To shock, follow the directions on your product’s label.
| Product | Change | Amount |
|---|---|---|
| Baking soda | TA +10 ppm | 6.7 oz191 g |
| Muriatic acid 31.45% | TA −10 ppm | 7.6 fl oz227 mL |
| Dry acid 93.2% | TA −10 ppm | 10.3 oz292 g |
| Muriatic acid 31.45% | pH 7.8 → 7.5 (TA 100, CYA 40) | 2.8 fl oz85 mL |
| Dry acid 93.2% | pH 7.8 → 7.5 (TA 100, CYA 40) | 3.8 oz109 g |
| Soda ash | pH 7.2 → 7.5 (TA 80, CYA 30) | 4.4 oz126 g |
pH doses depend on your TA and CYA, so use the calculator for your numbers. Acid and pH-up amounts are rounded down.
| Product | Change | Amount |
|---|---|---|
| Stabilizer (CYA) | +10 ppm | 4.0 oz114 g |
| Stabilizer (CYA) | 0 → 40 ppm (new fill) | 1.0 lb454 g |
| Calcium chloride 77% | CH +10 ppm | 5.8 oz164 g |
| Calcium chloride 77% | CH +50 ppm (one step) | 1.8 lb818 g |
| Pool salt | 0 → 3,200 ppm (new fill) | 80.1 lb36.34 kg · 3 × 40 lb bags |
| Pool salt | +500 ppm | 12.5 lb5.68 kg |
| Model | Capacity (manufacturer) |
|---|---|
| Intex Easy Set 15ft x 33in | 2,587 gal |
| Intex Prism Frame 16ft x 8ft x 42in | 2,873 gal |
On this page (9 sections)
With 10% chlorine, it takes 3.8 fl oz, and with 6% bleach, 6.2 fl oz. At this size, doses are measured in ounces and tablespoons, not jugs and bags.
Quick answer: chlorine for a 3,000 gallon pool (depends on product)
A routine top-up of free chlorine (FC) from 1 to 4 ppm takes about 9.2 fl oz of 12.5% liquid chlorine, 12 fl oz of 10%, or 19 fl oz of 6% bleach. With dry chlorine, it is about 1.8 oz of 65% cal-hypo or 1.3 oz of 90% trichlor. FC is the chlorine still available to sanitize. With stabilizer (CYA) at 40 ppm, aim for 3–5 ppm.
The most common mistake at this size is pouring by the jug. One gallon of 12.5% pool chlorine adds about 42 ppm to 3,000 gallons, and one gallon of 10% adds about 33 ppm. Measure with a marked cup, and keep a set of kitchen measuring spoons for pool use only: 1 fl oz is 2 tablespoons.
Dose table: chlorine by product for +1/+2/+5/+10 ppm
The table above has every row for 3,000 gallons. Two dry products deserve a note at this size. A 1 lb bag of 65% cal-hypo adds about 26 ppm, so "one bag per pool" is far too much. Weigh out ounces instead. A 1 lb bag of 56% dichlor adds about 22 ppm of chlorine and roughly 20 ppm of stabilizer at the same time, which can push a small pool's CYA too high in a few weeks. For everyday dosing, liquid chlorine or plain bleach adds no stabilizer or calcium. The liquid chlorine calculator adjusts for jugs that have lost strength.
Shock dose: scale your product’s label
How much shock to add comes from your product's label, not from a chart. Most labels give an amount per 10,000 gallons, and 3,000 gallons is 0.3 of that. So a cal-hypo label that says 1 lb per 10,000 gallons means about 4.8 oz here.
Weigh it out instead of adding a whole bag. A 1 lb bag of 65% cal-hypo adds about 26 ppm of chlorine and about 18 ppm of calcium to 3,000 gallons. Don't swim until chlorine is back at or below the limit on your label (often 4 ppm).
pH and alkalinity: acid and baking soda
Lowering pH from 7.8 to 7.5 takes about 2.8 fl oz (a little over 5 tablespoons) of 31.45% muriatic acid when total alkalinity (TA) is 100 and CYA is 40. At TA 80 it drops to about 2.4 fl oz, and at TA 120 it rises to about 3.3 fl oz. TA is the buffer that resists pH change, which is why the dose moves with it. Other fixed amounts for this volume:
- Lower TA by 10 ppm: about 7.6 fl oz of muriatic acid.
- Raise TA by 10 ppm: about 6.7 oz of baking soda (see baking soda in a pool).
- Raise pH from 7.2 to 7.5 (TA 80, CYA 30): about 4.4 oz of soda ash.
Because the amounts are small, a heavy pour can overshoot. Add half, wait 30 minutes with the pump running, and retest. The muriatic acid calculator takes your own TA and CYA.
Stabilizer, calcium, and salt
- Stabilizer (CYA): 4 oz per 10 ppm, and 1 lb from 0 to 40 ppm. Use the stabilizer calculator if you already have some.
- Calcium chloride (77%): 5.8 oz per 10 ppm; 1.8 lb for a +50 ppm step.
- Salt: 80.1 lb from 0 to 3,200 ppm. The shopping list rounds up to three 40 lb bags, but two bags (80 lb) already give about 3,195 ppm. Keep the third for top-ups; 12.5 lb raises salt by 500 ppm. See the pool salt calculator.
If you use trichlor tablets, a pool losing 1 ppm a day needs only about 3.1 oz of trichlor a week, and that adds about 4.2 ppm of stabilizer each week. Check the tablet weight on the bucket before loading a floater.
Pools that hold about 3,000 gallons
Two models in our list are just under this size, and both hold less than their dimensions suggest:
- Intex Easy Set 15 ft × 33 in (inflatable ring): 2,587 gallons at an 80% fill. A plain cylinder of that size at 80% is 2,908 gallons, so the sloped sides take away about 11%.
- Intex Prism Frame 16 ft × 8 ft × 42 in (rectangular): 2,873 gallons at a 90% fill, about 5% below a box of the same size.
Dosing the Easy Set as a 3,000-gallon pool adds about 16% more chemical than it needs. That is harmless for a chlorine top-up, but it matters for acid. For round sizes, see the 15 ft round pool page.
Calculator preset to this volume
The calculator above starts at 3,000 gallons. Enter your model's capacity if you know it, then your test readings and products. It lists the steps in order, with small doses shown in ounces. Neighboring sheets: 2,000 gallons and 4,000 gallons.
Safety. Keep the pool measuring cup for pool chemicals only, and rinse it between products. Never mix chlorine and acid. Add them at least 30 minutes apart, with the pump running. Keep kids out of the water until chlorine is back in range. Always follow the product label. Poison Control: 1-800-222-1222.
FAQ
How much chlorine do I put in a 3,000 gallon pool?
Per 1 ppm: 3.1 fl oz of 12.5% liquid chlorine, 3.8 fl oz of 10%, or 6.2 fl oz of 6% bleach. From FC 1 to 4, about 9.2 fl oz of 12.5% or 19 fl oz of bleach. Other sizes: how much chlorine to add.
How much shock for a 3,000 gallon pool?
Use the amount on your shock product's label, scaled to your water: 3,000 gallons is 0.3 of a "per 10,000 gallons" dose. For a cal-hypo label that says 1 lb per 10,000 gallons, that is about 4.8 oz, not a whole 1 lb bag.
How much muriatic acid for a 3,000 gallon pool?
About 2.8 fl oz of 31.45% acid to lower pH from 7.8 to 7.5 at TA 100 and CYA 40, and about 7.6 fl oz to lower TA by 10 ppm. Add half, circulate, and retest.
Sources
- Intex, Easy Set 15 ft × 33 in product page, read 2026-09-29: intexcorp.com
- Intex, Prism Frame 16 ft × 8 ft × 42 in product page, read 2026-09-29: intexcorp.com
- Taylor Technologies, K-1005 instruction manual and treatment tables: PDF
- Formulas and reference checks: methodology