Sorry, I wasn't completely awake. but you all got the point. I just ordered the atlas. As far as introducing the groups to the tank, successively or simultaneously? does it matter? with plenty of hiding places, are dithers still a possible menace? should i yank the pleco (approx. 6"). please, no comments about the phrasing. Thanks mike and dave. ------------------------------------------------------------------------- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto