Aquatabs Water Purification Tablets (397mg, 100 Pack). Water Filtration System for Camping, Boating, Emergency Water, Survival Kit, and Marine. Easy-to-Use Water Purifier Treatment.

Aquatabs. https://a.co/d/05X5vBmn Do this. 1 tab in the empty tank. I can let mine sit for 2-3 weeks, open the tank and stick my face in there and there’s ZERO, literally ZERO, smell. It’s the only option. Nothing else works like this. Just buy them and thank me later.