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Thank you for all your help. A little off topic, this is my 2nd summer with pool, but after draining this offseason switched to liquid chlorine. Based on tests I seem to be dropping by about 4ppm every 48 hours, which has me burning thru chlorine. How often do you put in liquid chlorine, do you...

Sorry for the missing info. First time through. I recently bought the fas-dpd testing kit and have tested cya twice with it, but it's pretty self explanatory for cya testing, so I don't think user error. I approximate 9000 gallon pool and put in 3.5 lbs of cya, although it is possible I...

Frequent reader, first time poster. Just drained my pool 2 weeks ago, and put the recommended amount of cya to get it to 30, however 10 days later it is reading 70. I am Using liquid chlorine versus using tabs before I drained, any hope this number will go down, or did I over shoot badly on my...