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What is used to raise CYA?

I'm back with results to discuss.... pH: 8.0 FC: 0.4 ppm CC: 0.5 ppm TA: 160ppm CH: 190 ppm CYA: 10 ppm Pressure is slowly rising. If it matters, it's a 62000l in ground :) Thanks in advance!!!

That sounds like a must- I'll get a new more complete test kit for sure. I'll also go to the "How to shock a pool" link under Pool school. I'll keep you posted, and thanks!

pH=7.5 FC= 1ppm CC= don't know TA= 140 CH= don't know CYA= don't know From the sounds of it, I am lacking alot of info. I guess my pool testing kit isn't complete enough for me to get these answers. So I'll take a sample to a local pool store and get the rest of the answers. Ugh...

We have an inground salt water pool. The SWG is set at 40%, chlorine is reading 1ppm and the water is clear. ph 7.4. Our problem however is that there is a slime build up on the cartridges. Water pressure will slowly decrease and we have to take the cartridges out to power hose them clean. Our...