Letter Re: Clarification on Calcium Hypochlorite for Water Purification
…things more confusing, they offered another brand of this that had 47% Calcium Hypochlorite. Please help close the gap on this topic as it is such an important one. – The Wanderer JWR Replies: The problem with most retail store employees these is that they are marginally qualified to run a cash register, but little else. To most of them pool water chemistry is an arcane art–not rational science. Don’t ask them chemistry questions! A granular (dry powder) “pool shock” product that lists only Calcium Hypochlorite as the active ingredient should be safe to use for water purification. The problem with other varieties is that they include other algaecide or fungicide chemicals that are probably not safe for human consumption. Ditto for using liquid bleach for the same purpose.ou want to buy Calcium Hypochlorite bleach. Do NOT buy bleach with fabric softeners, scents, et cetera. Keep in mind that bleach…