For reasons I don't want to get into, HTH has gone from cheap alternatives to the more expensive companies (with the same ingredients) to mixing "concoctions" that are supposed to be "convenient" but can cause all kinds of problems--like "Double-acting" Tri-chlor tablets. Sounds good? But the double action is provided by copper, which, while good at killing algae, causes more problems than it fixes. They also lowered the content of the Cal-Hypo from 68% to 48% at WalMart's request. 48% dumps a lot more "inert" junk in your pool than 68% and you need a lot more to get the same chlorine level.

So we suggest you stay away from HTH chemicals generally. "Cocktails" of chemicals in one container are, pretty much always a bad idea.

You can completely take care of almost (but not all) any pool with the B-B-B basics: Bleach, Borax, Baking Soda, Muriatic Acid, and Cyanuric Acid (CYA/Stablilizer). For SWCG pools, you need to add...Salt. And for hard-sided pools you have to add calcium, or cal-hypo.

Carl