I had this silver hatchet fish for 5 days now. Yesterday I saw that the top tailfin had been ripped off and I'm not sure which one of my other fish may have done it since they are all supposed to be peaceful and I have not seen and of the fish harassing my hatchetfish. I think that it is basically dieing since it keeps swimming down to the bottom of the tank and laying in the fake grass, but when I shooed it with the net it swam away fine. Should I just remove it from the tank? It's still breathing but keeps goin back to the same corner :/