AquaChek 7-in-1
Free Bromine reading of 4 ppm
Ideal
What it means
Free bromine at 4 ppm is the sweet spot for a bromine pool or spa. Sanitizer is fully active, bromide reserve is healthy, and the water is safe for swimming.
What to do
No action needed. Hold this level. Test again in 2 to 3 days for a spa with light use, or daily during heavy bather load.
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