The brasiliensis is not there for long term, I want to add some dwarf cichlids like a apistos and kribs, I have a all pond solutions efx filter which is rated for tanks of 1000 litres(265) gallons and I do a 30 to 50 percent water change a week. I really want some more catfish but don't know any that would work, my tank could be fully stocked and that's fine but it seems to have quite a bit of space, the silver dollars are three to four inches and the featherfin is about 7 inches. Can you recommend any tank mates.