This forum is GREAT! Excellent, informed commentary from all sides!

(Myself, I'm runnin about 18,500 give or take, in an inground vinyl Polynesian installed circa 1978. This will be our 10th year and it has been wonderful- don't see how I ever lived without one. Looking forward to another semester of dream state manatee emulation and experimental buoyancy exercises.)

But I digress. I started having trouble with "high chlorine" last year and suspected that my brand new Hayward CL200 was defective, ie, the control valve or O-rings: wide swings from zero to wide open, or so it seemed, with no in-between. Now I am becoming persaded that the problem stemmed from the use of stabilized chlorine, and associated buildup of CYA. I of course used 3" tri-chlor tablets with occasional supplemental hits of di-chlor granules.

How refreshing and liberating, to learn that plain old regular bleach is the preferred method of chlorination!

I'm forever blowing bubbles...