Sounds like this might be your problem. The sudden increase in feeding overwhelmed the bacteria in your filter sponges. Maybe if you increased feeding gradually, it would give your bacteria time to increase to keep up with it. Good luck! Sherry ----- Original Message ----- From: Cory and Susanne Williamson snip..... ....The tank had 10 1.5 inch long young altispinosas in it who had not be fed a full diet for about a month (I was away on and off for work). The problems began when I stepped up their feeding to a more normal rate. Cory ----- Original Message ----- From: Mike & Diane Wise To: apisto@admin.listbox.com Sent: September 15, 1999 7:11 AM Subject: Re: Peat and Substrate for growout tanks I agree with Helen, either your filter is not mature or you have too much bio load for the filter system you are using. Personally, I use large sponge filters in small tanks. It works well for me. Mike Wise Cory and Susanne Williamson wrote: > I was asking about the bare vs tanks with > substrate, because I seem to have had trouble > with ammonia buildup in bare tanks. Cory ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"! ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"! ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!