I have had several tanks that had no filtration whatsoever. These fish produced more than one species of cichlid. Filters are really not necessary unless you want a ton of fish. Water changes and nutrient export via plant harvesting are probably far more beneficial than even the best filter. Scott --- Yvan Alleau <yalleau@OCE.ORST.EDU> wrote: > > Hi David, > I agree with you concerning the extraordinary > potential plants have to > recycle matter and how important they are for our > tanks and our fish. Not > counting on the beautiful aspect they gave to the > tanks. Nevertheless i > would be reluctant to leave a tank without > filtration, depending on the > fish population that it contains. ------------------------------------------------------------------------- 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.