murray cod attacking tandanus

[SiMMo]

i have murray cod, tandanus catfish and a golden pearch and my cod keeps attacking my catfish so i have put a barrier between them for a few months now and the cod keeps trying to attack it thru it. any suggestions to stopping this from happening so i can take it out?

thanks heaps

SiMMo

[7.62]

Feed the Cod more, and give the catfish somewhere to hide in the tank that is not near the cods hole.