K bisulfite vs K metabisulfite. Any reason not to use this as a sanitizer. My LBS had packages of this instead of K meta and he said that it should be the same. I did a little research and some have suggested that they have different uses and some have suggested that it is all K meta when mixed with water. Any thoughts? Would this reaction happen: KHSO3+H2O-->K2S205. Its been a long time since I have taken chemistry and I am not sure.