Water Chemistry

Chlorine, pH, alkalinity, algae & testing

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Caught a slow FC drift before it turned into anything, thanks to trend data Small one but felt good. Been logging daily and noticed my FC was drifting down about 0.3 a day for four days straight, nothing dramatic, pH and TA bo… Water Chemistry Priya Raman Aug 7, 2026 5replies 0likes pH keeps crashing a day after i dose liquid chlorine, alkalinity's fine so the swamp's clear now, been running good for a few weeks, but every time i dump in liquid chlorine to keep FC up in this heat my pH drops like a ro… Water Chemistry swamp_tyler Aug 8, 2026 2replies 0likes FC won't hold overnight, pH steady, algaecide already ruled out Got a weird one, and it's my own pool this time not a customer. FC at dusk reads 4, next morning it's down to 1 or lower, every single day this week. … Water Chemistry tampapoolguy Aug 7, 2026 3replies 0likes My own pool's CYA crept up to 90 and I never added a single tab Kind of embarrassing since I test this stuff for a living on other people's water and forgot my own. Been topping off with liquid chlorine all summer … Water Chemistry tampapoolguy Aug 5, 2026 2replies 2likes

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Cloudy water, stubborn algae, chlorine lock, confusing test strips — post your numbers and the community will help you get balanced.

Share your test results (free chlorine, pH, total alkalinity, CYA, calcium hardness) when you post — it's the fastest way to get an accurate answer instead of a guess.

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Water Chemistry

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