My 10 gallon with 2 3-4" convicts with 10 or 15 1/4" fry got a huge crack in it and I don't want to risk a leak, so would they kill a 3-4" senegal bichir and two 3.5" opaline gouramis?
Convicts will prolly take over teh tank and start stressing everything else until it dies. short term it might work.. but I wouldn't do it for more 'n a few days.