I had 4 tetras--2 glowlights, 2 neons--in with my female
betta, panda cory, otocinclus, and ghost shrimp in a ten gallon tank. The tetras were peaceful and happy until about two weeks ago, when they spontaneously began to fin-nip and eventually killed both my male and female betta.
They have been in a temporary tank for a few days, and it's not big enough for them to stay in long-term. I want to put them back in the ten-gallon with the new female betta and the rest, but I am worried about them hurting her like they did the others.
Should I put them back in, or try to give them a seperate tank?