Hi I've a 580L aquarium set up at (63x24x28") with a 7" endlicheri bichir, common plec 4", and a 6" arrowana. Once moved next month another tank will be built it with this tank possibly becoming a sump (if not it will be 4x2x2'). I'm looking to put in some mid swimming fish but unsure what to or what I could put in. Tin foils & cichlids I'm not that keen on and silver sharks are a bit skittish, was maybe thinking of some silver dollars? (Not sure if they will clean up the anubias tho) are there any other suggestions?