Archie, It all really depends on the species you choose. Personally I would put in the less polygamous species first and the more polygamous ones last. Polygamous species (like macmasteri-group species) & the more robust monogamous forms (nijsseni-group species) have a tendency to take over the bottom of a tank first & keep newly introduced fish at bay. If the fish are all equal in size, I imagine you could put them all in at the same time & let them set up territories. I doubt that you will need dither fish. The other apistos will make good target fish for each other. I see no purpose for keeping any fish in a breeder tank other than the breeders - especially one that is 2 - 3 times larger than the apistos and armored like a tank. If you sare not particularly interested in getting large quantities of fry, then other fish make it a more interesting aquarium. Mike Wise Archie Christian wrote: > 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 ------------------------------------------------------------------------- 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