[COM]

Well... some claim to "neutralize" ammonia and nitrite on the label. I think that's pure BS.

All tanks need to have well-established bacterial colonies to deal with ammonia, nitrite, nitrate, and other lovely toxins. I find that nitrate will build up to a toxic level within two weeks on any tank regardless of filter media, tank size, or fishload. Water changes are key and water conditioners like Tetra AquaSafe or API StressCoat are essential to keeping your fish healthy and happy.