I have 4 small jags 1.5 to 2 in. in a75 gallon grow out tank. my question is do you think i can put a silver aro in thats aboat 3 in. or maybe a knife fish the cichlids this shop has are ones i already have. thay have redtailcats dont know if thats some thing i want to do. maybe irradecent sharks or balas as dithers. what are some other fish that might work with them? any ideas would be apreciated.