Quick answer: Algaecide usually is not clearing your pool because active algae needs chlorine shock, brushing, filtration, and balanced water first. Test.
You added algaecide to your pool, and now you're staring at green water wondering if you should shock it. Here's the problem: how long after algaecide.
Your pool turned into a murky swamp overnight. Maybe an algae bloom got out of control, or a dust storm rolled through. Either way, your sand filter is.
Quick answer Use a sodium thiosulfate pool calculator when free chlorine is too high and you need a careful neutralizer dose. Enter pool volume, current.
Quick Answer: To calculate breakpoint chlorination, multiply your combined chlorine reading by 10 to get your target free chlorine level, then subtract.
Quick answer A pool CSI calculator shows whether your water is corrosive, balanced, or scale-forming by combining pH, water temperature, calcium hardness.
Quick answer To calculate boric acid for a pool, multiply pool gallons by the borate ppm increase you want, then multiply by 0.0000477. A 10,000-gallon.