Needed more bleach and thought I might pick it up at Home Depot. Found 2 different types; one was "Clorox outdoor bleach" which didn't list ingredients at all but I imagine it has some detergents mixed in. The other was "Clorox Germicidal Bleach", which I can't even find at Clorox.com?? Some commercial grade I guess. Active ingredient was sodium hypoclorite -- well and fine but I just want to make sure that the 94% of "other ingredients" are pool-friendly. For now it's back to the grocery store for "regular"