Pool Problem Fixes
Diagnose what's wrong and get the specific fix. Every page includes a step-by-step treatment protocol with exact doses.
Green Pool
Algae bloom (low or absent FC). Fix: shock to 30 ppm, continuous filter runtime, 3-dose protocol over 24 hours.
Cloudy Pool Water
Three causes: low FC, pH imbalance, or filtration failure. Diagnose before treating.
Algae Bloom (Mustard / Black)
Mustard algae needs approximately 60 ppm FC target (per Trouble Free Pool protocol). Black algae needs repeated treatment + aggressive brushing. (Same shock + filter protocol as a green pool; start there.)
High CYA (Chlorine Lock)
CYA above 80 ppm blocks chlorine effectiveness (per CDC MAHC CYA/chlorine data). The only fix is a partial drain and refill; calculator shows exactly how much to drain.
Low / Zero Chlorine
Emergency: FC at 0 means the pool is unsafe. Get the dose to bring chlorine back to a safe range, then retest before swimming.
Pool Opening Problems
Green water at opening, CYA too high, pH crashed over winter. Diagnosis and fix.
Pool Closing Checklist
Chemistry, line blow-out, equipment storage, and cover installation for winter.