First, let me say a big THANK YOU for all those who contribute to this forum. If I hadn't discovered it, I'd still be paying $$$ to the dolts at the local pool store. I really think they should be required to have some sort of certification in pool chemistry because after all that I've read here, I really think I know more than they do most of the time. Now on to my post...
I've had yet another MA bloom this year. It's my fault, I don't spend nearly enough time maintaining my pool (I was told that with a SWG it would be "virtually maintenance-free!" Yeah, right. I've read and re-read multiple posts on SWG pools and MA cures. Here's where I am...
31,000 gallon IG SWG pool with Vinyl liner
5/11 @ 1800 - Vac to Waste to remove as much MA as possible
added water
5/12 @ 1800 - Vac to Waste again then brushed and sampled
FC-1.5
CC-0
TC-1/5
CYA - 40
pH - 8.2
TA - 280 (!!)
Added water
Per pool calculator added:
11.5 gallons of 6% chlorine bleach
2# of CYA (all I had on hand)
Brushed pool again
5/13 0800 - Vac to Waste
Added water
Brushed pool
Per pool calculator added:
6# of CYA (calculator called for 11# but I was scared of getting a high CYA and it dissolves so slow...)
1.3 gallons of Miuratic Acid
5/13 2100 - Tested water
FC - 10
CC - .5
TC - 10.5
pH - 7.5
TA - 280 (still)
CYA - did not test
Added 6 more gallons of 6% bleach
Brushed pool
5/14 0700 - tested water
FC - 31
CC - .5
TC - 31.5
CYA - 60
pH - 8.0
TA - 280
Salinity - 4400 (btw)
My plan going forward is to test again after sunset, then again before dawn to see if my FC holds. I overshot my goal of 24 on the FC but it's done now and the sun will kill some of it most likely.
I'm going to add some more miuratic acid now to drive the pH down. My understanding is that the pH must be low (approx. 7.0) to lower the TA level. Is the high TA causing me other problems? Any and all suggestions are appreciated.
Richard "I HATE MUSTARD ALGAE" Gautier
I've had yet another MA bloom this year. It's my fault, I don't spend nearly enough time maintaining my pool (I was told that with a SWG it would be "virtually maintenance-free!" Yeah, right. I've read and re-read multiple posts on SWG pools and MA cures. Here's where I am...
31,000 gallon IG SWG pool with Vinyl liner
5/11 @ 1800 - Vac to Waste to remove as much MA as possible
added water
5/12 @ 1800 - Vac to Waste again then brushed and sampled
FC-1.5
CC-0
TC-1/5
CYA - 40
pH - 8.2
TA - 280 (!!)
Added water
Per pool calculator added:
11.5 gallons of 6% chlorine bleach
2# of CYA (all I had on hand)
Brushed pool again
5/13 0800 - Vac to Waste
Added water
Brushed pool
Per pool calculator added:
6# of CYA (calculator called for 11# but I was scared of getting a high CYA and it dissolves so slow...)
1.3 gallons of Miuratic Acid
5/13 2100 - Tested water
FC - 10
CC - .5
TC - 10.5
pH - 7.5
TA - 280 (still)
CYA - did not test
Added 6 more gallons of 6% bleach
Brushed pool
5/14 0700 - tested water
FC - 31
CC - .5
TC - 31.5
CYA - 60
pH - 8.0
TA - 280
Salinity - 4400 (btw)
My plan going forward is to test again after sunset, then again before dawn to see if my FC holds. I overshot my goal of 24 on the FC but it's done now and the sun will kill some of it most likely.
I'm going to add some more miuratic acid now to drive the pH down. My understanding is that the pH must be low (approx. 7.0) to lower the TA level. Is the high TA causing me other problems? Any and all suggestions are appreciated.
Richard "I HATE MUSTARD ALGAE" Gautier