Originally Posted by
waterbear
Check the prices of the 12.5% stuff at the pool store. Sometimes that's the best buy. One in my area (ok the one I work at!:rolleyes:) sell the 2.5 gallon carboy for $3.99 for a refill. (There is a one time $5.99 charge for the carboy and then you just bring the empty back and pick up a new one.) That's the equvalent of slightly more than 5 gallons of ultra bleach for $4! Dosing is easier also. 1 oz raises 1000 gallons 1 ppm FC so if you have a 16,000 gallon pool each 16 oz. (1 pint) will raise it 1 ppm or if you have a 22,000 gallon pool each 22 oz will raise it 1 ppm, etc.