I regularly put pairs of cacatuoides into a 10 gallon tank with several flower pots, this is my normal method of breeding the species. A 10 gallon tank will be fine. Now the Sp refers to an unidentified species of Apisto. I have several pairs of apistos with the Sp in the title, such as Apisto sp Belem, Apisto sp Mamore Reds and Apisto sp Maulbruter. When you see a fish with cf in the title such as Apisto cf Cruzi. This means that the species is simliar to Cruzi but may not be cruzi. John ------------------------------------------------------------------------- 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"!