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We do have some Calhypo on hand. So we will use it up unless you say not to because: - it is very old, the cellophane bag it is in is totally shot, crumbles, but the bucket is fine - it is as if it is wet, like wet sand. Is it cool to use it? No worries if not, we have some calcium increaser...

A huge thanks for all the help. Richard of course you are right about shocking; we did re-think that statement after we posted; there were SOOO many leaves & an FC of ~ 0 we just assumed it’d be necessary but we will re-test & act accordingly. We’ll get that CH in range as the last step...

Is this the correct sequence? First Target a CYA of 45 so drain 55% of the water & get all the leaves etc out. Refill the pool to normal level. Target an FC of 8 so add 299 oz bleach. Brush & circulate 1 hour. Re-test for CC, start shocking if indicated, if not indicated then add the baking...

TFP’r Johhny B is here to help me so that should help as we continue this thread; but Johnny B has never faced a high CYA issue 3/22/2012 pH 7.6 FC 0-0.5 CC 0.5? didn’t really turn pink to start with TA 50 CYA 100+; it was pretty close to the 100line, not distant from the 100 line CH...

New to the board, have recently bought a house with an inground pool and am eager to learn how to maintain it properly. Great forum! Scott