In the U.S. Clorox regular UNSCENTED concentrated bleach lists 8.25% sodium hypochlorite in its ingredients and (I think) it also lists 7.9% Available Chlorine. You do NOT want to use outdoor, splash-less, or scented bleaches. The outdoor and splash-less bleach contains thickeners that will cause foaming in the pool water.
Wal-Mart has Great Value bleach that competes directly with Clorox and is 8.25%. Staples sells Clorox Germicidal Bleach which also lists the percentage and is OK to use. As a general rule, if you don't see the percentage on the label, don't buy it unless you know it is only bleach without additives that you do not want.
Wal-Mart has Great Value bleach that competes directly with Clorox and is 8.25%. Staples sells Clorox Germicidal Bleach which also lists the percentage and is OK to use. As a general rule, if you don't see the percentage on the label, don't buy it unless you know it is only bleach without additives that you do not want.