Wait a minute . . . You said that you have an inline chlorinator and you add granules every few days? You put trichlor tabs in the feeder and are dumping dichlor granules in the pool directly? Is that right? CYA levels are usually very stable so minimal draining and backwashing will not lower it all that much. Hmmm. Did you test the CYA or did a pool store test it? That kind of Dichlor your using is 56% chlorine whereas Trichlor is 90%. 1 lb of Dichlor should raise your chlorine level about 3 ppm, in summer heat, direct sun, every 3-4 days, that doesn't sound all that unreasonable . . . you're gonna love the Salt Cell . . . I'll bet.
SJohnson
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