So I have a Midas blenny, 3 firefish, and a Melanurus Wrasse in my 40g QT. I noticed early on that the Wrasse had damage on his rear fin. Today I also noticed that the Blenny was chasing a firefish. I’m fairly certain at this point that the Midas blenny is nipping fins. If I separate the blenny, will a 10g be okay? Is there another way to reduce aggression without setting up another qt?