Hi Greg! I also think that keeping apistos in "colonys", is nice and interesting. Since I live in northern Sweden, apistos are quite rare in the few aquariumshops around here. So when I occasionally get hold of a unusual species, I use to buy at least 8-10 of the same species! This is because I know that Its very likely that it can be a couple of years until I see them next time in a shop. So I normally keep my apistos in colonys. This is natural and interesting. Ever since I read the book by Romer, and especially the notes about the very high population densities for species like Gibbiceps and Diplotaenia, Im getting even more interested into making a biotope aquarium with a lot of apistos of the same species. A couple of years ago I experimented a bit with a couple of my Borellis. I set up an 250 litre tank only for about 7-8 Borellis. I used ????( what´s the english name on this white plastic stuff they put into boxes as transport security? :-)) to make a very shallow "lagoon" in one third of the tank. The bottom were sloping up almost to the surface and into this very shallow area. The water depht was only 2-4 cm deep! I covered all the "plastic stuff" with silicone and then I covered all of it with sand, so It looked very natural. A lot of planting and hidingplaces, and the Borellis were in heaven! I had very fine sand in the tank, and the females loved to dig holes in the sand. And of course you can guess were the most popular place in the tank was? The female apistos spawned one after the other in the very shallow water. It was very funny to see a female Borelli guiding a batch of frys in a water depht of 2 cm! The next project will be to set up my 550 litres tank for my Resticulosas (Which are very peaceful) or for some Gibbiceps (if I can get hold of some). By the way. A very nice website about dwarfs you had there! Wonderful pictures on Borellis! I just wish I could read Polish! :-) Best regards/ Per Grzegorz Prusinowski <gprusinowski@poczta.onet.pl> wrote: > Is it possible to have a peaceful 240L tank with the following individuals (presently in it)? > - Very young couple of A. cacatuoides (female: 1cm and already defendig eggs from her brother, with 2cm - I would prefer to avoid this mate...); > - Couple of D. filamentosus; > - Couple of A. borelli. since we're at it - I'm in this hobby for mere 2 years and without any spectacular successes, but already have "my way" :-) or rather what I would like to achieve in future. I think this way gives the best of them little cutties to the observer. it's keeping apistos in single species "colonies" of 8 or more individuals, balanced sex ratio. a biotope-fan dream... is it possible to make such a colony living? to grow youngsters in such a "community" tank? what dithers would be suitable (Carnegiella strigatta is my favourit at the moment)? it's not only on paper, it seems to work for A. maciliensis (Mamore, blue tail) - 5 males and 3 females in 250L (55G?) and I even managed to get 1 juvenile from them - the natural way - now an adult male - although the dithers (neon tetra) are too aggresive towards the fry and at the moment I have some other apisto with them (tanks don't grow on trees, you know ;-). any experience in this kind of projects? I must say I never saw anything like this life, which may indicate it can't work... but perhaps you know better? Regards Greg Grzegorz Prusinowski www.apisto.pl ----------------------------------------------------------------------- -- 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 Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader --------------------------------- It's Samaritans' Week. Help Samaritans help others. Call 08709 000032 to give or donate online now at http://www.samaritans.org/support/donations.shtm ----------------------------------------------------------------------- -- 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 Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader