Pool just installed 2 months ago. Water was nice for a while, but I never had a quality test kit until just two days ago and I now know that I have not had near enough chlorine in the water. I have seen a yellow colored substance on the floor of the pool and when brushed it turns to dust. I can usually vacuum the majority of it up and shocking with Chlor-Burst Dichlor helped once. I ran out of Chlor-Burst and decided I wanted to use the BBB method from now on anyway for convenience. Pool is now worse than it has ever been with green water and I need help!
I just purchased the TF-100 kit and results from yesterday were:
TA: 300-310 (very slight red color noticed at 30 drops, 31 was more noticable)
Using the pool calculator to bring FC up to 12 tells me to add 372oz bleach - I just added 460oz for good measure, except I poured it around the perimeter of the pool and not in front of the return (is this important?). I know my TA is very high, but was surprised the pH was not also high. Do I need to add muriatic acid ASAP to bring that level down or should I concentrate on keeping the FC high and killing whatever is in the water? Lastly, the CYA is low although I read where it should not be 0 since I have used Dichlor before.. do I need to bring this up right away as well and I am also not sure how to do that. My pool does get direct sun light all day long, no shade until the sun goes down. It is also worth mentioning that 2 minutes after adding the 460oz bleach today we had a major downpour and I think that will continue through most of the night so I would imagine this got diluted.
How often do I need to check and what levels do I need to maintain? Thanks for your help, this site is awesome!