Radiant Waves Pool Intelligence
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All measurements

Oxidation-Reduction Potential

The water's actual sanitising power — the truest single measure of whether the pool is safe to swim in.

Out of range Target 650–750 mV
366 mV
 
Now
366
Low
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High
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Average
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Readings
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Good to know

There is no chlorine reading here because the ICO cannot take one. It has no chlorine sensor — it measures ORP, the water's oxidising power, which is what chlorine actually delivers. That is arguably the better number: ORP reflects sanitiser that is working, whereas a chlorine test only tells you how much is present. Chlorine locked up by cyanuric acid still shows on a test strip while doing very little. ORP cannot be converted to a reliable ppm figure, because pH, cyanuric acid and temperature all shift the relationship — so use a test kit when you need an actual chlorine number, and use this to know whether the water is sanitising. Your free-chlorine target on the setup page is what sizes the doses recommended here.

Bringing this back into range

Sanitiser level is low — the water isn't keeping up

Salt cell output Raise output by 30 percentage points
  1. Turn the chlorinator output up by about 30 points and extend the pump run time by 2 hours a day.
  2. Confirm the salt level is in range — a cell starved of salt quietly stops producing.
  3. Inspect the cell for white scale. Scaled plates cut output badly; clean with a 4:1 water-to-acid soak if you see buildup.
  4. Check pH first. High pH depresses ORP even when chlorine is fine.
  5. For an immediate catch-up you can add about 3.6 qt (114 fl oz) of liquid chlorine while the cell rebuilds.

Over the last 47 hours ORP has been turning back the other way, currently about 356 mV a day. Left alone that puts it near 338 mV in 8 hours further off target, so this amount is sized against that rather than today's 366 mV.

Don't swim until sanitiser is back in range.

Cyanuric acid above roughly 80 ppm suppresses ORP no matter how much chlorine is present — if ORP stays stubbornly low, test CYA.

Retest after about 8 hours of circulation.

Other measurements