AnnaK
07-03-2007, 01:16 PM
I got interested in the economy of the different bleach solutions available and thought I'd share my findings with you.
Cost of bottled bleach:
Pool store carboy @ 12.5% = $0.0218/oz
Sam's Club, Clorox Ultra @ 6% = $0.023/oz
Sam's Club, Clorox regular @ 5.25% = $0.019/oz
Original Bleach Calculator Formula:
(1,000,000/PV) * C * UB = FC ppm Added
Formula reworked for Units of Bleach needed to increase FC by 1 ppm:
FC * 1/C * PV/1E6 = UB
My pool volume is 12,000 gallons. Hence:
1 * 1/0.1 * 0.012 = 0.12 gal = 15 oz @ 10% Pool store ----> $0.33
1 * 1/0.0525 * 0.012 = 0.23 gal = 29 oz @ 5.25% Regular ---->$0.55
1 * 1/0.06 * 0.012 = 0.2 gal = 25 oz @ 6% Ultra ----> $0.58
The pool store chlorine is said to be at 12.5%. I'm using a 10% functional concentration in my calculation because chlorine degrades with time and storage conditions. I have not tested the concentration to get a real number because the dilution factor using my Taylor reagents makes my head explode.
I use a 4 cup plastic measuring cup to add bleach. You may already know this but Google has a neat units converter. You input "0.12 gal = ? oz" and it returns 15 oz. Or you say "15 oz = ? cups" and it tells you 1.875 cups.
I should be cleaning house in preparation for weekend guests but this was more fun. Unless I got the math wrong, in which case I'll be really, really embarrassed.
Cost of bottled bleach:
Pool store carboy @ 12.5% = $0.0218/oz
Sam's Club, Clorox Ultra @ 6% = $0.023/oz
Sam's Club, Clorox regular @ 5.25% = $0.019/oz
Original Bleach Calculator Formula:
(1,000,000/PV) * C * UB = FC ppm Added
Formula reworked for Units of Bleach needed to increase FC by 1 ppm:
FC * 1/C * PV/1E6 = UB
My pool volume is 12,000 gallons. Hence:
1 * 1/0.1 * 0.012 = 0.12 gal = 15 oz @ 10% Pool store ----> $0.33
1 * 1/0.0525 * 0.012 = 0.23 gal = 29 oz @ 5.25% Regular ---->$0.55
1 * 1/0.06 * 0.012 = 0.2 gal = 25 oz @ 6% Ultra ----> $0.58
The pool store chlorine is said to be at 12.5%. I'm using a 10% functional concentration in my calculation because chlorine degrades with time and storage conditions. I have not tested the concentration to get a real number because the dilution factor using my Taylor reagents makes my head explode.
I use a 4 cup plastic measuring cup to add bleach. You may already know this but Google has a neat units converter. You input "0.12 gal = ? oz" and it returns 15 oz. Or you say "15 oz = ? cups" and it tells you 1.875 cups.
I should be cleaning house in preparation for weekend guests but this was more fun. Unless I got the math wrong, in which case I'll be really, really embarrassed.