Ok I have converted my sister to the BBB method, also got her to get a TF100 test kit. She was having trouble keeping the FC (1.5) level up and CC was also running high(1.5). Pool was starting to turn a little green. We were trying to go to shock level based on the reading from the Store, "CYA level of 100". Well the pool was getting better like really quick . Well to make a long story short, I was over there this weekend and did the CYA check with the TF100 kit. Well the CYA actually measured <20 I could fill the tube completely to the top and still see the black dot very clearly. So I take it the Store measurement is wayyyyyyyyyy off.
Told her to get conditioner to bring it up to 25-30 and she should be ok.
Anyone else run into this????
YBnorman...have a pool