Subj : Amonia Levels To : All From : Mike Date : Wed Nov 03 2004 06:57 am Have a 75 gal community tank. Been established for 2 years. No current or prior problems with dying fish. Have started to pay more attention to water quality. Can't get Ammonia level to "0". Have performed 3 50% water changes in last 7 days. Vac gravel at same time. Feed once every two days. Use de-Clor with replacement tap water. Ammonia level drops to 0.25 day after 50% change but increases to 1.0% after that. Run out of ideas. How do I eliminate the amonia. Thanks very much. --- þ RIMEGate(tm)/RGXPost V1.14 at BBSWORLD * Info@bbsworld.com --- * RIMEGate(tm)V10.2áÿ* RelayNet(tm) NNTP Gateway * MoonDog BBS * RgateImp.MoonDog.BBS at 11/3/04 5:57:45 AM * Origin: MoonDog BBS, Brooklyn,NY, 718 692-2498, 1:278/230 (1:278/230) .