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Can I use sodium hydroxide in lieu of soda ash?

I am trying to get my total alkalinity to come down. It is 320-340. My ph has been staying around 7.2. Chlorine is high. FC is 7. Ideas on what to do to lower the alkalinity?

Hi I've been adding CYA (up to 5lbs now) and still can't seem to get it to register even at the 20 level. I'm using solid CYA in a sock in the skimmer. I put this in over a week ago...still nothing. Any other ideas?

Hi all, I'm a newbie at Pool school. Can you tell me where to buy CYA? I also appreciate the threads on bleach prices...following that!

Hi and thanks for any help! I cleaned my cartridge filters yesterday. After reassembling and turning the pool back on I'm not seeing any bubbles on the floor of the pool. these would previously be there when i turned the pool back on. the pump seems to be running. The pressure is back to...