Keep pool chemicals cool, dry, and locked.

Yes, that’s basically it. Your garage or shed floor isn’t ideal—too much temperature swing and moisture. A cool basement corner or a dedicated plastic bin in a shaded spot works better.

The real risk isn’t just degradation (though that happens—chlorine loses potency fast when hot). It’s safety. Pool chemicals react with each other. Spill a little acid near some shock, and you’ve got a bad time. Keep them in their original containers, tightly sealed, and separated by type. No mixing, not even storage near metals or fertilizers.

Lock them up if kids or pets might get curious. Otherwise, just find a spot that stays under 90°F and dry, and you’re fine.

Pool season comes back eventually; don’t let your chemicals check out early.