Im afraid to say it but neither one of those tanks are suitable for tha catfish you have. If it is a channel, they can reach 3 ft and 60 lbs. If it is a columbian, they need brackish water and can reach 15 inches. Also, just a note. The pacus you have can reach 3 feet and weigh more than 70 lbs. You need to seriously look into upgrading to a bigger tank or try to find a new home for them before they become stunted.