From one day to the next I went out and found the pool's water green and cloudy. I went to Lowes and purchased some Shock Plus Xtra Blue and Algaecide 20% by Aqua Chem.
I put the recommended dose for my pool size. It said it could be repeated in 72hrs if needed. (1 lb (bag) per 10,000 gallons.) I entered my test results on the Pool Calculator and it recommended shock at 23 for mustard algae. I wasn't sure if what I had was mustard algae. Initially I was just trying to reach shock level based on the Pool Calculator. The water cleared up but you could still see the stuff on the bottom and floating in water when it was brushed. Floating not as a solid but more as green dusty stuff. I used 5 of the large containers of Bleach 6% from Samsclub next. (Two one day and three the next) The next time I shocked I used 2 bags of the Shock plus extra blue, and when the FC wasn't raised that much I added the third bag to raise it more. I have the TF-100 test kit.
I have been running the pump 24/7 since this started. I would wait between applications to make sure it was mixed up well before I tested the water. (Like overnight) Then tested the water again and while it has been above the shock range recommended by the Pool Calculator it has never made it to the high range recommended for mustard algae. I am beginning to think that is what it is since it went away only to come back again. I was reading this site and saw where someone suggested putting pool toys in to let them soak, too. To keep them from making the algae come back. I didn't think about doing that with the whale brush and net. Today I put them in and am wondering if that is what makes my water still have something in it. I added stabilizer yesterday since the FC never really got very high. (Possibly a mistake since I read CL is easier to raise with CYA lower?)
This has been going on now for 1 1/2 or 2 weeks. Any Suggestions would be greatly appreciated. (It looked great at the beginning of the year!) These numbers read vertically. It wouldn't let me do columns.
5-28-12 FC 18.5 CC 1 TC 19.5 CYA 38 PH 7.8
5-30-12 FC 13.5 CC 0.5 TC 14
5-31-12 FC 12.5 CC 0.5 TC 13.0 TA 90 PH 7.8 CYA 38
6-3-12 FC 11.5 CC 1 TC 12.5
6-4-12 FC 15 CC 1 TC 16 CYA 55 TA 100
This is what it looks like today. It has never been as bad as it was when it started but it has not been totally clear either. I was also reading about Borate. I got the pool last summer and I have never added Borate. I think I understand that it is not necessary but might be desirable.
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