poolchemistrycalc

Raise stabilizer

Into 21,100 gal of water, add

3.59lb 1.63kg

HASA Pool Conditioner — cyanuric acid, 98.0%. Stabilizer from 20 ppm to 40 ppm.

Stabilizer on one scale: the band up to 100, the ideal band 30–50, the reading now at 20 ppm, and an arrow to 40 ppm carrying 3.59 lb. reads now 20 ppm target 40 ppm ideal no higher 30 50 100 3.59 lb +20 ppm with HASA Pool Conditioner

Your pool

feet, the long side
feet
inches of water, not wall height
inches of water
what your kit reads
where you want it

The quantity, the drawing, every product row and every step on this page are worked again as you type.

At 21,100 gal

Every product that does this

This product makes the whole change of +20 ppm on its own.
Product Add Also moves
HASA Pool Conditioner
cyanuric acid 98.0% 		3.59 lb
1.63 kg		 nothing else measured

The HASA Pool Conditioner label says: “5 lbs per 20,000 gallons provides 30 ppm”.

In steps, if you would rather

Split into 5 equal steps of 11.5 oz each: add one, run the pump, and test again before the next.

To reach Total added
24 ppm 11.5 oz
28 ppm 1.44 lb
32 ppm 2.15 lb
36 ppm 2.87 lb
40 ppm 3.59 lb

Where the band comes from

Source Range
Florida 64E-9.004 (1)(d)4
conventional pool 		up to 100 ppm
Florida 64E-9.004 (1)(d)4
spa or hot tub 		up to 40 ppm

Pool and spa rules are adopted and amended state by state, and most of the ranges here are written for public pools. Confirm every figure against the code your jurisdiction has adopted and against your own product label.

Other adjustments

Updated October 2026

Sources and dates

Ranges are quoted from the code named beside them, product strengths from the manufacturer's own product page, each retrieved on the date shown.

This site publishes calculated water volumes and chemical quantities for home pool and spa owners. It is not a health, safety or professional service, and it does not replace the instructions printed on the product you are holding. Not affiliated with, endorsed by or sponsored by HASA, Pyrock Chemical, Pentair, Hayward, Sonoma Hot Tubs, the Centers for Disease Control and Prevention, or any state health department. Product names are the trademarks of their owners and appear here only to identify the strength of what is in the container.