as i said Tank mates for 8 inch Asian upside down catfish he is very aggressive he chased my pearsei cichlid so much that he stopped eating and is extremely stressed but i have nothing else in the 40 gallon tank they are very aggressive my lfs sometimes gets big fish from people who can not take care of them i have a marine land penquine bio wheel 200 witch filters up to 50 gallons i will try to go out of my way to go to try to get it a tank mate but can he have a tank mate if so what type of fish thanks
