I'm a newer pool owner, this will be season 3. First year didn't do anything but put chlorine tablets in and kept the pool frog mineral pack in service. Year 2 started having continual algae problems. Did research this year, found this website and learned about CYA in the tablets and shock packets.
I've now been trying to bring the water in line without having to drain nearly all of the water at once but have ran out of time and have algae attacking. My CYA is now down to about 150 (it was off the scale at 200). I'm pulling the pool way down right now.
My question is should I not even try to SLAM the pool until I get the CYA levels to a reasonable level or should I go for it once I fill it back up this afternoon regardless of the levels?
I should mention I don't have the full kit yet which measures CYA, I've had Leslies test it and have been using strips. I have the chemical test kits for the other measurements.
Thanks, wish I'd found this site 2 years ago!