I have tried many different products over the years, and nothing is as good as Aquabon. I have tried the cheaper stuff, and have immediately gone back to this product, as it is SO much better than the competition. I don't even understand why West Marine sells any other water freshener products at their stores.
I live in a very rural part of Northern NY, and my friends who are preppers also love the product for their water storage tanks. All around great product!
Save yourself the headache, buy the superior product, and enjoy!
After winter layup, I flush the water system a couple times, then use Aquabon slightly stronger than suggested, then let it set for a week (overnight probably would work also). Then drain the water system once more, then add the proper amount as suggested by the mfgr on the next refill. For the remainder of the season, I add at each water tank refill as recommended. We normally use 28 gal every other week in not anchored on overnights, no water tank odors, this stuff works for me.
I have been using this product for the past 15 years and have not found an easier to use product that does exactly what it says. It keeps water fresh year round as long as you follow directions and keep each tank of water treated. I use the water for drinking, washing and making ice in an ice maker. The water always tastes fresh and refreshing.