- Jun 18, 2010
- 61
- Pool Size
- 27000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Hi,
My pool FC has been dropping 10 ppm daily due to sunlight. CC is always zero and I verified an overnight chlorine loss of less than 0.5 ppm (dropped from barely 14.0 to 13.5 from 10:45 pm to 6:30 am).
So I tested everything last night and this is what I got.
FC 3.5
CC 0.0
pH 7.9..8.0
TA 110
CYA less than 30 dot barely visible with tube filled to rim
CH 260
I immediately added 3 168 oz jugs of 6% Bleach. Adding $8 worth of bleach every night is getting old fast! :grrrr:
This morning I added about half a gallon of 31.45% Muriatic Acid. I over compensated a bit and now the pH is 7.2..7.3. My pH tends to drift up about 0.3 per week, so I plan on letting it rise on its own as opposed to adding soda ash (or similar).
I remeasured CYA (didn't know if the previously high pH affected the low CYA reading) and it was still the same (under 30).
So... I have tons of dichlor and 3" tabs as I have only recently converted to the BBB method. Should I add 3-4 lbs of dichlor and leave tabs in the floater until my CYA is up? Or should I buy stabilizer?
I'd really like to know why my CYA dropped so much. In June I replaced half my water to lower the CYA from 95 to 50. So it's been about 45 days and my CYA has really dropped. There has been a fair amount of splashout and I had to drain several inches from a few rains, can that account for all of this CYA loss?
Please advise if dichlor/tabs are appropriate for raising the CYA over the next week or so. If my CYA is going to be dropping 20 ppm / month, I may as well go back to the (much easier) tab chlorination. The reason I switched to bleach was to avoid my CYA reaching 95 as it did before.
My pool FC has been dropping 10 ppm daily due to sunlight. CC is always zero and I verified an overnight chlorine loss of less than 0.5 ppm (dropped from barely 14.0 to 13.5 from 10:45 pm to 6:30 am).
So I tested everything last night and this is what I got.
FC 3.5
CC 0.0
pH 7.9..8.0
TA 110
CYA less than 30 dot barely visible with tube filled to rim
CH 260
I immediately added 3 168 oz jugs of 6% Bleach. Adding $8 worth of bleach every night is getting old fast! :grrrr:
This morning I added about half a gallon of 31.45% Muriatic Acid. I over compensated a bit and now the pH is 7.2..7.3. My pH tends to drift up about 0.3 per week, so I plan on letting it rise on its own as opposed to adding soda ash (or similar).
I remeasured CYA (didn't know if the previously high pH affected the low CYA reading) and it was still the same (under 30).
So... I have tons of dichlor and 3" tabs as I have only recently converted to the BBB method. Should I add 3-4 lbs of dichlor and leave tabs in the floater until my CYA is up? Or should I buy stabilizer?
I'd really like to know why my CYA dropped so much. In June I replaced half my water to lower the CYA from 95 to 50. So it's been about 45 days and my CYA has really dropped. There has been a fair amount of splashout and I had to drain several inches from a few rains, can that account for all of this CYA loss?
Please advise if dichlor/tabs are appropriate for raising the CYA over the next week or so. If my CYA is going to be dropping 20 ppm / month, I may as well go back to the (much easier) tab chlorination. The reason I switched to bleach was to avoid my CYA reaching 95 as it did before.