first post. In ground fiberglass 18000 gal. purchased TFP test kit this spring b/c green water upon opening. Replaced salt generator 2 weeks ago.
Last monday tests were: salt 3800, FC 3.5, CC 1, PH 7.3-7.4, TA 160-170, CH 240, CYA 45.
Swam in pool weds all seemed ok. opened last night to a green stink. Been running pump 15 hours a day. Probably not enough with temps 95+. Will run 24/7.
Added 9 gal bleach here are results: FC 17, CC.5, PH 7.0, TA 200, CYA 45.
Why did PH drop so much in 5 days?
How can I raise PH w/o increasing TA even More? Guess I dont quite get it yet. Thanks in advance.