Pool water is a shared bathing environment kept safe by chemistry alone, and that chemistry moves hourly with bather load, temperature and sunlight. Free chlorine too low permits pathogen transmission; combined chlorine climbing is the chloramine that irritates eyes and lungs; pH out of range makes the chlorine present ineffective regardless of its concentration. Every one of those is invisible in clear water.
The steps ChatterFix schedules for this PM. Every step is a checkable item on the work order — a technician can speak their way through it without touching a keyboard.
Pool water is a shared bathing environment kept safe by chemistry alone, and that chemistry moves hourly with bather load, temperature and sunlight. Free chlorine too low permits pathogen transmission; combined chlorine climbing is the chloramine that irritates eyes and lungs; pH out of range makes the chlorine present ineffective regardless of its concentration. Every one of those is invisible in clear water.
The water still looks fine, which is exactly the problem — there is no visual signal for a chemistry failure until an outbreak is traced back to the property. Recreational water illness incidents are reportable, closable, and reputationally severe. The secondary failure is corrosion: sustained low pH quietly eats the heater, pump seals and pool surface.
Daily at minimum, and multiple times a day during heavy bather load — most jurisdictions mandate the frequency and the log. Treat the log as the deliverable: in an investigation, unrecorded readings are indistinguishable from readings never taken.
This procedure — and every other PM for your industry — is already built into ChatterFix. Pick your industry and it lands on the right equipment, on the right interval, in about three minutes.