I have mainly SA cichlids, many from black waters. The reasons that leave me to use a plant filter are: 1) it is practically impossible to have alive plants in a tank with those animals (except the dwarfs); 2) in poorly buffered waters (as must be the case in black water), the gas changes (O2/CO2) during the night/day cycle promote big changes in pH. Terrestrial plants make those changes in the air, not affecting the water. Once the original article is 3 years old, and it was the author's first trying, I can't stop thinking if it wasn't made some improvement in the system. Zeco http://sites.netscape.net/zecocarvalho/ -----Mensagem Original----- De: Scott McLaughlin <relli@aye.net> Para: <zecocarvalho@ig.com.br> Enviada em: segunda-feira, 16 de outubro de 2000 17:30 Assunto: Re: Plant Filter > Hello Jose, > > I have had very good results using aquarium plants and a rich substrate > There is usually algae in these tanks (sometimes a lot), but I haved had > brichardis, J. floridae, J. dickfeldi, and C. moorii spawn in tanks with no > filtration other than plants. For the substrate I used clay cat litter (I > think I will skip this part in the future to reduce algae possibly), sand, > florite (by SeaChem I think), and a small amount of gravel. If you skip the > cat litter then add more florite. > > Scott ------------------------------------------------------------------------- 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"!