How should I store pool chemicals safely?

Keep them in a cool, dry place, tightly sealed, and never store different chemicals next to each other. Heat and moisture make them break down, creating useless powder or a fire hazard—use a basement shelf away from heaters or an insulated garage. Separate chlorine and acid into different plastic bins with lids, and avoid metal containers. If the room smells like a pool, you have a vapor problem—fix the seal or move them.