Re: Hot tub use

You only want 35% food grade peroxide. It sells for about $10 a gallon around here. Any place that cooks food uses it to sterilize counter tops and machines, etc. It is ilegal to sell, so many don't want to chance selling it. Many times you can get 30% factory grade where soft water equipment is sold and it is OK for a tub, but not to brush the teeth.

MH