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Also, if you are NEEDING to add CYA (stabilizer), and have higher PH, and add chlorine you CAN use some tricolor 'shock'. That does add CYA, is acidic, and does add chlorine. Just make Sure you done use it too much and over-shoot the CYA Level. If you are 'stuck' it usually because the shock...

Not all the chemicals at wal-mart are bad. If it says anything-blue It has copper in it. Since my CYA (stabilizer) level is low when I start up the pool I toss some 1" tablets in a floater, as I'm clearing the pool. Them its back to BBB+saltwater generator! Whatever you do, be cautious about...