Well, my big tank (10x4x3 atm) is in its planning phase, and I'm finalizing stocking plans for it. It seems on the heavily stocked side, but is it really overstocked? I have planned:

5 bala sharks
Niger cat
Giant gourami
Largemouth bass
Clown knife (maybe, if there's enough space then definitely)
Black arowana
Chain pickerel

So what do you think? Enough space or no? Keep in mind the tank is 40 square feet with a 3 foot water column for swimming. Thanks!