Hello again everyone. I'm converting my swamp into a swimming pool! Started with a green pool (see photos). Got my test kit and tested pH (8.2) and CYA (110- possibly inaccurate due to swamp conditions). Pool store measured TA (130), CH (400) and FC (0 of course).
To lower CYA, I drained 10,000 gallons by siphoning (took 4 days) and refilled. New numbers- pH-8.2, CYA-50, TA-60, CH-250.
I brought pH down to 7.4 with MA (took 68 oz total). Started shocking 7 days ago using 10% liquid chlorine. The water turned milky immediately and after the first day, I was quite pleased with the progress. I've been testing, adding chlorine to bring it up to 20 ppm (I assume, since I never actually measure right after adding), brushing daily (OK, I missed one day a couple days ago) and cleaning the filters daily. I've also been removing as many leaves as I can with the leaf rake each day, considering I can't see the bottom. I do not currently have a working sweeper (will be getting one, along with a new variable speed pump on Monday).
The water is very slowly getting clearer. It took 6 days to see the bottom of the shallow end (I was measuring progress by how many steps I could see). I can now barely make out the black leaf rake at the bottom of the deep end, but can't yet see the drain. It's taking longer than I thought, but is consistently getting better.
The overnight chlorine test, however, does not seem to get better from day to day. I'm typically getting 19-21 after sunset and 16.5-18 first thing in the morning (at 6:30 am, ~45 minutes after sunrise, before the sun hits the pool).
Does it normally take this long to pass the overnight test when converting a swamp? Should I be doing something different? Or do I just need to be patient?
Any suggestions for an inexpensive way to get rid of the white scale line around the pool?
(after draining and refilling)
(after first shock)
(end of day 1)
(end of day 4)
(end of day 6)