Hi Brendan, A.borellii are one of the more peaceful and easy to keep apistos. I think this is one of the few that can be safely kept and bred in neutral and perhaps even slightly alkaline water. So your water looks fine. If you were to get one of the more difficult Apistos like A.iniridae then you may need to keep your water more on the acid side. What size is a 20gall tank, is it 36x12x12? If so then you should manage to keep all four fish together. Make sure you spread your pots around the tank and include separate areas by putting up borders such as pieces of bog wood or lines of plants. Incidentally I use clay pot stands about 4" diameter turned upside down with a little notch cut out of the rim as spawning sites, the fish love them. When I had borelli they spawned are reared a few fry (<10) at an incredibly small size, the female was only about 0.75" total length. It is certainly worth while joining the British Cichlid Assoc if you want to learn more about cichlids, there may even be a cichlid group in your area. For my info are there any other Apistos available in your part of the country at present? Up here recently have been available A.nijsseni, A.panduro and A.cacatuoides these are the first I have seen in the shops for ages. Cheers, Ken. ***************************** Ken Laidlaw Royal Observatory, Edinburgh Web: http://www.roe.ac.uk *****************************