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Re: Where'd the CYA go?
White stuff is not iron or copper . . . unless you've added aluminum sulfate, it's probably calcium carbonate from your cal hypo.
You should vacuum it up, and then backwash your filter. If it blows through, vacuum to waste, and THEN check for filter for sand loss. Do you have a 2 speed pump? If so, run on low.
Last edited by PoolDoc; 05-09-2012 at 01:32 PM.
Reason: correct "sulfate" to "carbonate"
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