How to Balance Pool Chemistry Without a Pool Service
Balancing a pool is not complicated once you know the order to do things in. The mistake most new owners make is adjusting one number, retesting, panicking at a different number, and chasing their tail all weekend. This guide walks through the sequence that actually works.
Test first, then adjust in order
Always start with a fresh test. Then adjust in this order: total alkalinity, then pH, then chlorine, and finally stabilizer (cyanuric acid). Alkalinity acts as a buffer for pH, so fixing it first keeps your pH from bouncing around after you adjust it.
Total alkalinity
Aim for roughly 80 to 120 ppm. Low alkalinity makes pH unstable; high alkalinity makes pH stubborn and can cloud the water. Add an alkalinity increaser to raise it, or muriatic acid to lower it.
pH
Target 7.4 to 7.6. Above that, chlorine becomes much less effective, which is why a pool can read "enough" chlorine and still go green. Lower high pH with acid; raise low pH with soda ash.
Chlorine
Free chlorine should sit around 1 to 3 ppm for most pools. The right dose depends on your pool volume and current reading, which is exactly the math that trips people up. Saltwater pools should adjust the salt cell output before adding liquid chlorine.
Stabilizer
Cyanuric acid protects chlorine from burning off in sunlight. Too little and your chlorine vanishes by afternoon; too much and chlorine gets sluggish. Aim for 30 to 50 ppm in most outdoor pools.
Pool Clarity
Enter your test numbers and get the exact dose for your pool, in plain English.
Learn more about Pool ClarityFrequently asked questions
What order do I add pool chemicals in?
Alkalinity first, then pH, then chlorine, then stabilizer. Adjusting alkalinity first keeps your pH stable.
Why is my pool green even though chlorine is high?
Usually high pH. Above about 7.8, chlorine loses most of its sanitizing power. Bring pH down to 7.4 to 7.6 and the chlorine starts working.
How much chlorine should I add?
It depends on your pool volume and current reading. A dosing tool that uses your specific numbers takes the guesswork out.