Okay well, with water that clear you would see a drain if you had one. So I guess we can rule that one out. An algaecide probably won't help you right now. They tend to get consumed by chlorine, especially at SLAM level. I suspect you'll be closing in the next month or so to winterize. At that point it's fine, just make sure to use one that is a Polyquat 60 based algaecide.I don’t know where the drain is.
Even though the pool and equipment are relatively new, part of the SLAM Process is cleaning the filter when pressure rises. Perhaps yours never did, unless the pressure gauge is stuck. But given the situation with that unusual stuff collecting at the bottom of your pool, it would be a good idea to look inside to see if there is any unusual material collected.in reguards to the filter. This is a new pool installed in June.
At this point that's probably a very good idea.Do you think I need to retest my CYA?
Proper lighting is critical for the CYA test, so you want to test for CYA outside on a bright sunny day. Taylor recommends standing outside with your back to the sun and the view tube in the shade of your body. Use the mixing bottle to combine/gently mix the required amounts of pool water and R-0013 reagent, let sit for 30 seconds, then gently mix again. Then, while holding the skinny tube with the black dot at waist level, begin squirting the mixed solution into the skinny tube. Watch the black dot until it completely disappears. If it helps, pour a little, look away, then look back and pour some more. Some people like to squirt enough solution to go line-by-line for a better feel. Once it disappears, record the CYA reading. After the first test, you can pour the mixed solution from the skinny view tube back to the mixing bottle, shake, and do the same test a second, third, or fourth time to instill consistency in your technique, become more comfortable with the testing, and validate the CYA reading. If you are still questioning your own results, have a friend or two do the same test 2-3 times. Share your results only after everyone is done to see if you came up with the same average results.
You know what? That means your previous SLAM level of 12 wasn't high enough. Regular SLAM level should've been "16". I wonder if that would explain the recurrence of the green stuff? Something to consider. Up to you, but when you do go up to MA level, I would go to an FC of 22 for 24 hours.Ok so I’m getting CYA 40.