ah yes I've read about how its basically a food chain sort of effect only on a smaller scale, but I always wondered how to tell if you have bacteria (which now I know). I probably knew at one time or just don't know now because im sick and hopped up on cold medicine :grinyes: . Thank you all for the information. My tank is looking a little better I'm sure in another week when I do another 50% change it should look almost perfect.