So I just added another FM to my tank, and the original FM isnt too happy about it. I heard that FM's were good community fish, so why is it attacking this new fish? Will this aggression stop? Please help
Also: The first FM is a female and the new one is a male but hes smaller than her.
Well thats the thing.. The female is starting to become sexually mature. I vented her and I clearly see that she is ready, but the male (I assume its male although I could be wrong) is not sexually mature yet.. I hope they start getting along.. The male I bought isn't in great shape either.. (Pet store has poor management of their FM's) I hope he doesn't get too stressed out
i had same problem as you after i added 2 slightly smaller FM's in with my 2" male FM. He didnt give up after a couple of days and i noticed a few nipped fins on the smaller FM's. I ended up giving the male 2 a friend.
Yours might act differently with the female being bigger.