55 Gallon Water Preserver Concentrate (5 years) Water Treatment Drops - Water Treatment For Drinking Water - Mayday Emergency Drinking Water - Defiance Fuel Water - Earthquake Water, Emergency Storage

Great to use for a 240 gallon water storage take. After two years, I do not see any algae buildup on tank walls. Too bad the price has gone up from when I first purchased it.

This water preserver concentrate is a must‑have if you’re storing large amounts of water for emergencies. It’s easy to use — one bottle treats a full 55‑gallon drum — and gives real peace of mind knowing the water will stay safe for up to five years. The instructions are clear, and the treatment doesn’t affect the taste. A dependable, no‑nonsense product for anyone building or maintaining an emergency supply. Easy to carry and store, Item was packaged well and did not leak. Good to go.

I have bought these several times. I pour them in my 50 gallons drums when I fill them during hurricane season. They smell like chlorine. Not sure what’s in them but they last a long time. I had them last 6 months.

Purchased this product to treat emergency water for storage. I guess/hope it works. I am relying on it to work. Hopefully, my family will never need it. It has a very slight chlorine smell but I think that is normal for any kind of water treatment.

great additive for storing water

This item is great for storing water for long term.

If it does what it says good value and nice sized little bottle for what I needed.

Came in handy sooner then I thought we had a storm that effected the water and I had already filled up gallons of water definitely have to get another bottle