Got that silly fish from together with some other fishes. Meant to remove it before putting in the pratas, but forgot about it. *SLAP* *SLAP*
Anyway, thot it was safe after I left 2 pratas in there for about a week, and they were fine. When I put in the red one in the centre of the tank, it start the nibbing.
Then I removed the red one and put a green one in another spot, it started on the green one too but left the first 2 alone.
After I removed the green one, it went for the first 2.... Guess once it start, there's no stopping it liao. *sigh*
Right now, I'm trying to ambush it after lights out, in the middle of the night. If still can't catch, will have to remove some rocks liao........