thanks, i just tested again, my ta is dropping like a rock, i'm losing about .1 ph a day and about 10 ta every 2 days. off thing is it seems to slow down the lower the TA is. 80 ta with a ph of 7.5 and it's 70 TA, ph 7.4, 2 day's later and then 60 TA with a ph of 7.2 then with ta between...