I have a 8 inch Venustus in a 120 gal tank. He lives with a bunch of fronts, pleco,s , white calvus and a bunch of small tedras. He does not hurt any of them. He is just a big sweet pussy cat. Raised him from about 1 inch and the only time he killed was when he was about 2 inches. He took out his brother and has been great ever since.
Also have a male and female about 5 inches . They live with a breeding group of OB Lab.and a breeding group of BN pleco,s and two 2 inch Firemouths. They also are very calm and have not killed anyone . I have not even seen them chase any other fish in the tank. I think Your fish needs more room, a 55 gal just don't cut it for these guys.And a rubber tub,wow. That is just plain mean. If this is the best you can do for this fish, You should take it back , sell it , or just give it away to someone who can give it the proper care and home it needs.
Also have a male and female about 5 inches . They live with a breeding group of OB Lab.and a breeding group of BN pleco,s and two 2 inch Firemouths. They also are very calm and have not killed anyone . I have not even seen them chase any other fish in the tank. I think Your fish needs more room, a 55 gal just don't cut it for these guys.And a rubber tub,wow. That is just plain mean. If this is the best you can do for this fish, You should take it back , sell it , or just give it away to someone who can give it the proper care and home it needs.

