I had 4 black neon tetra’s in my tank along time ago with other fish and i had a big die off and all the fish died cept 1 black neon tetra and 1 other fish.. I recently fixed the problem in my tank and got new fish and have had them for 3 weeks now. I had 4 Danio rose as some of the newer fish and 1 died, and 1 has a big mark on him and i noticed another seems to have multiple marks on him like they had been in fights.

Iv been watching my fish closely and the danio’s play together alot and no other fish bother them except the black neon tetra.. He constantly attacks them, charges them and gets right on them. I suspect he is the one that might have killed 1 danio and hurt the others.. All my other fish are fine. All my neon tetra’s are alive and fine. Its just the danio’s.

I tried to find more black neon tetra’s so he can have buddys but none of the 6 fish stores i went too had any… So what should i do ? I have another fish tank i can put him in, the tank has 3 Dwarf Gourmies and a bunch id say 8 platy’s and a few bottom feeders. Im thinking maybe since he doesnt attack my platy’s just the danio’s he would be ok in that tank.. I dont know tho hes been in my tank for over a year now so its “his” home.