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trying to close my pool for season and added an entire gallon jug of chlorine early today to start the shock process but am still getting a '0' FC test reading now 6 hours later even though the pump/filter has been running the entire time. 18K gallon pool and water is maybe 50 F. Do I need to...

Hey, this may be an easy one but I don't want to throw my other numbers out of whack....my pH since opening this spring has hovered around 7.8 and is now creeping up to the 8 range. should I try to lower it and if so how? My other numbers are all great, passed overnight free chlorine loss...

can anyone recommend good clarifier brands? even better: warn me on bad ones?!

I have a new 27' x 52" above ground pool that's been full for 3 days. Am using a SWG and salt test this morning was 3200 ppm. Am getting free chlorine reading at 1 (am still running SWG around clock to get levels up). CYA was 30 and added 4 lbs more this morning. My real question: pH is at...

I've had an Intex 16' pool for 2 years and am about to switch to a new 27' above ground pool. My first big question is whether or not to try to fill this pool with softened water. I get about 2000 gallons of capacity from the softener per recharge, so it will take 13 or 14 recharges to ensure...