Newly added Midas Blenny showing aggression

[MadTownFess]

I have a 45 gallon tank, that has two 6 month old clowns. Two weeks ago I added a sixline wrasse, royal gramma, and a Midas Blenny. The Blenny has considerable size on everyone, and has been a bully. One of my clowns has a mark on his side from being bitten, and now has a small chuck of the edge of his back tail bitten off. How long do I let this go on for I need to return the Blenny. Is my clown in danger of getting killed?

 

[Frtdrmrose7]

If the Blenny is exhibiting that much aggression then I would return him.

 

[MadTownFess]

If the Blenny is exhibiting that much aggression then I would return him.

He seems to most be picking on one clown in particular... the largest fish in the tank. Any chance they just work out their differences? Its only been 2 weeks

 

[Eva Rose]

Midas can be aggressive in smaller tanks. I would definitely return the Midas. It is very stressful to the clown & he is getting injured. 2 weeks is a long time . The Midas is not going to relent.