ive just took back a black ruby barb as it was too aggressive to my community tank and got a clown loach ive got one already and had it for 5 mths but instesd of getting on they chase each other round the tank and nip is this normal. ive one beta,3 swordtails,2 platys,2flying foxs,2 bronze catfish,2 clown loach,in the tank