I have bred Cacatoos in very bright planted tanks with no problems at all - Borellis also spawned in a planted tank. Both were in 15 gals. In my cacatoo tanks, I had sponge filters and overflow filters, but if you have a heavily planted tank, with correct nutrient levels and lighting, then you could do without a filter, and maybe just circulate the water with a small powerhead. I have a pair (I hope) of agasizzis in a 25 gal planted tank with a Fluval canister filter filled with peat to help keep my water soft and acidic. The fish love it. Another suggestion would be to get a number of clay pots and turn them upside down with the drain hole up. I use a few different sizes, and sometimes have to enlarge the drain hole a bit, but the apistos love these, and they're pretty cheap at Wal Mart. HTH. ===== J. Miller Edmonton, AB, Can. __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ ------------------------------------------------------------------------- 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://www.digital.com for "Apistogramma Mailing List Archives"!