I'm running an SWG (3200 PPM) and Zeolite in my 26" Pentair Sand Filter. The pool is 26000 gallons. I have not noticed any combined chlorine and the water has been crystal clear since the pool installation in early March this year.

I keep the PH in check with Muriatic acid, FC at 3PPM and stabilizer at 40PPM. We swam for the 1st time this year yesterday. The air temperature was 93 and the water temp was 81 degrees. Very refreshing.. I had a hard time getting the kids out of the pool...