PoolSentry

Four-week projection — chlorine & saturation

pH & total alkalinity

CYA, CH

Test result

Chemical addition

Trichlor tabs are not logged here — the model feeds them continuously from the tab schedule in Settings.

Recent tests

Recent additions

Chlorine

pH

Total alkalinity

CYA & CH

Prediction vs measured

Each row: what the model predicted for that test date using only earlier data, next to what you measured. This is the number that tells you when to stop testing.

Pool

Name Volume (gal) TDS constant Tabs / week Tab weight (oz) Liquid chlorine % Acid product CO₂ rebound (0–1) Verify test every (days) Surface area (sq ft) Model rain dilution SLAM mode — FC target 40% of CYA, pause demand learning Salt water generator (SWG) Cell rating (lb Cl₂/day) Cell output % Pump hours / day Salt target (ppm) Salt min (cell faults below) Salt max (cell faults above)

Fill water & season

Fill values drive all drain/refill math — measure them, don't guess: test a bucket from the pool's fill tap with your normal kit and enter TA/CH/pH here. Retest yearly; utilities shift source blends.

Fill TA Fill CH Fill pH Water temp mean °F Seasonal amplitude °F Peak day of year Live solar data (Open-Meteo) for chlorine demand

Click the map or drag the pin to your pool. Neighborhood accuracy is plenty — this only drives weather.

Latitude Longitude Sun fraction of FC loss Solar reference (MJ/m²)

Targets

pH target pH min pH max TA target TA min TA max FC min % of CYA FC target % of CYA FC SLAM % of CYA CYA target CYA max CH target CH max CSI min CSI max