I'm using the 30 longs as I got 4 of them for $5 each and the owner gave me 4 more and about a dozen box filters. Like I said, I'm doing this cheap....(-: Thanks for the advice EVERYONE. Jason Jason, I too am somewhat new to apistos. I'm up to 20 tanks. I started with the 30 longs that you describe but, I found it was kind of a waste of height. I mainly use 20 longs now with divider. When fish breed or are raising fry I try to give them the whole tank if possible. I do have a 55gal planted tank but, my breeding tanks are bare bottom. As for the CO2 I too use the DIY yeast injection and what the krib has to say is pretty good. If you need more info I would check out the Plants mailing list here's their link. http://www.actwin.com/fish/aquatic-plants/index.php Hope this helps.... -=JerryB=- <A HREF="http://www.members.aol.com/jerrcarol">JerryBsApistoWorld</A> "Life is What happens when your busy making other plans" << File: ATT00000.html >> ------------------------------------------------------------------------- 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.