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I just closed out on a house that has a in-ground pool and my father-in-law sent me the TF-100 kit as a welcome home gift. and i just tested my pool for the 1st time: FC: 4 CC: 0 TC: 4 PH: 7.2 TA: 100 CH: 500 CYA: 20 that is what i got ( if i did the testing right, followed the direction that...