I can't seem to get the chlorine levels to register with my test kit. The water is crystal clear with no complaints about irritation. On private well that comes out of the ground at about 7.8ph with very high calcium bicarbonate levels. I add muriatic acid by the gallon. And have added a double amount of CYN over the last while. My biggest question is, is the pool safe with out any detectable chlorine levels. The SWCG (compupool cpsc36) runs 8 hours a day at 90%, from 8 pm to 4 am. Thanks