The other night one of the kid swimmers in my pool noticed the pool light had some gunk on it. I started to investigate things further and noticed that the rock holding down my skimmer basket also was slimy. The pool skimmer itself was also very slimy feeling.
My water has been pretty clear and my numbers have been good all season long. I have never measure and more or any less than .5 combined chlorine. I know that .5 can mean trouble depending on whether or not the water is clear.
I would say my water is not up to par. While it is clear, it isn't crystal clear like it normally is. So I have started testing more vigorously. I have learned that my CYA has gone way down. I could barely get the dot to disappear giving me a reading of approx 15.
I added stabilizer yesterday. I have been adding bleach to get it to shock level but the water is still not crystal clear. It has a slight opaque cast to it. So it seems to me that I need to learn why my water is unclear.
The most likely culprit is something is growing in the pool. So now I am a bit unclear on where to turn. Should I start the shock process again or should I wait for more of the stabilizer to disolve? Also when I do start the shock process again and perform the OCLT test, do I need to keep the filter running over night?
Here are my current numbers:
(these tests were performed yesterday, cya could have risen some but it takes awhile)