lundi 5 mai 2014

Stopping fish aggression?

Hi all,



I've had my 30g innovative marine tank running for about 5 months solid now, only lost 2 hermits in the process. In addition I have a 10g sump underneath with a skimmer as well. I do water changes weekly and have several corals doing well.



I've had 2 clowns in the tank for about 4 months and they seem to get along fine. The female beats up on the smaller clown a bit until he does the submission dance, but he eats fine, doesn't have any fins torn.



About 2 weeks ago I bought a smaller midas blenny and introduced it into the tank. During most daylight hours, they don't seem to bother each other at all that I can see, but I have noticed the female clown has some tearing on her tail fin. I doubt the male is doing it, although she does occasionally do the submission wiggle as well, but she pretty handily keeps him in line.



Is it possible the blenny is beating up on her when I'm not around? They are fed daily and I am also supplementing nori seaweed about once a week. There is a large amount of hiding spaces in the rock, and no other fish in the tank. The Blenny is about 2.5 inches long, and the female clown about 2, male is probably 1.75 but they have been established for significantly longer than the Blenny.



Is this something I should be worried about or will it subside in time? Again, there is no noticable fighting when I've watched the tank, neither fish seems afraid of one another and the tears are not significant, but they are there.



Would introducing an anemone protect the clowns? I know anemones are not a guarantee, but they seem like they try to host my torch coral constantly without it's acceptance. Am I just over thinking this and its a natural part of them getting adjusted? Any thoughts or comments would be appreciated.




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