Why do people feel the need to pour stuff into their aquariums water handle real or imagined problems the have with that fish. The solution is most likely not in a bottle people especially when you have no idea what you pouring in to the tank in the first place. Use this and "Never change water again" this stuff "cure anything from Ich to cancer" and etc. etc. and you have no idea what's in it. Stop believing what the manufacturer are telling you in their sells pitch an do some real research, they're trying to sell you something. If you have more that 2 boxes or bottles of product that you routinely add to your aquarium you ain't doing something right. Sometime ya'll are adding 2 products that do the same thing. If you go to Tetra's Aquarium Water Care first page the are 24 water additives on that page, 24 product that would bet money that most of the average fish keepers could n't tell me what is in one of them. "A better life though science" applies to aquariums but that science is not in those $10.00 bottles, get a basic understanding of water chemistry, do your maintenance tank, do your research on you livestock before you buy, and stop it with all the chemicals. I guarantee you won't see all the unhealthy fish that I read about day after day here at this forum.