BTw have drained and refilled another 6000 gallons bring my exchange up to around 10000 galls or 60 to 65 %, The pump isnt on yet but the tests so far are: FCl 2.5, TCl 2.5, ph 7.6, TA 200, CYA 70, TH 250. The TH test was pinkish rather than red and purple rather than blue which is metal ion...