Long and difficult month of pool maintenance with no circulation and I have a dark green pool on my hands. Long story short I did rigid PVC plumbing, cracked the eyeball return fitting from torqueing to hard on the male pvc fitting, replaced that, found a big tear in my vinyl liner, patched it, pump seal developed a leak.... etc etc.
Anyway I'm finally leak free and started the SLAM process today. I have a few questions though. My pH reading originally came out a dark magenta, like a deeper color than 8.2 on the TF-100's basic test. So I added enough HCl to go from 8.2 to 7.4, tested it again an hour later and it was the same color. So I added the same amount again, tested again and still way high??? My other strange result was my CYA was practically non-existant. Slightly cloudy in the tube but filled it all the way to the top without blocking out the dot. My CYA to close the year was 40, but I did lose a bunch of water and refill a few times. So, I have a sock floating in front of the return with the amount to bring it up to 30 ppm from what I'm guessing was approx 5 ppm to start. Is the high pH and low CYA indicative of a conversion of last years CYA into ammonia? If so, what level should I be targeting to SLAM, regular SLAM or mustard algae SLAM? I am slamming the pool right now based on 30ppm CYA and the green is already fading to gray, and the FC is dropping dramatically pretty quickly. I targeted 15 ppm and like an hour later it was 8.5 FC and 1.5 CC. The high pH is what really worries me. Now that I started to SLAM though I know the pH result could be off. Could it be a reagent issue or can my pH have really climbed to such a caustic level over the winter? The t-100 kit is a new one from this spring.
Sorry I know that is alot of questions but I'm a little stumped and quite honestly pretty frustrated with this season so far. Could be worse though, my neighbors pool walls busted during the thaw this year. I'm going to crack open a cold one and await some respones.