Bleach vs pucks effective chlorine.......

[mbar]

I'm not sure of the math of bleach vs pucks, but I do know that cal-hypo pucks are also adding calcium to your water. The only way to get rid of excess calcium is to do a partial drain and refill. Everything you put in your pool adds something, but the olnly thing bleach adds is sodium - which is good for the eyes! It is also almost ph neutral. Once you get your cya in a range, it is very easy to figure out your own pool chlorine demands. You will be able to adjust easily for excess bather loads. It is easier to pour 1/2 bottle of bleach in when you need a little extra I know that you are a bleach fan, but tell your wife not only is it cheaper, but you can use it for other things around the house too, so it will never go to waste

[nisqu]

I think what Chris needs to know is what is the effect if one gallon of 6% bleach on say 10000 gals of water, I too have searched for this info.
It's the only way to compare the cost of bleach VS pucks.

[chem geek]

I did a cost comparison of chlorine sources in this thread. Basically, Trichlor at first appears to be less expensive per chlorine added until you account for the cost of the chemical needed to adjust the pH since Trichlor is very acidic. Obviously the costs are examples and you may find your costs to be somewhat different, especially for bleach and chlorinating liquid. The thing to keep in mind is that Dichlor and Trichlor will add to Cyanuric Acid (CYA) while Cal-Hypo will add to Calcium Hardness (CH).

The size of Trichlor pucks varies, but an 8-ounce puck in a 10,000 gallon pool will increase FC by 5.5 ppm and CYA by 3.3 ppm. It takes 14 cups of 6% bleach to get the same FC or 7 cups of 12.5% chlorinating liquid. It would take 11 ounces weight of Cal-Hypo 65% to get the same FC.