We have had the large tank up and running for a week and a half now,
and all has been fine and dandy. The betta, who was the first occupant
of the new tank, this evening turned up with a small piece gone from
his tail. We are wondering who it could be...

2 dwarf neon rainbows
2 bosmani rainbows
2 Clown loaches
1 Plec

Any help would be appreciated

Thanks