I bought a black ghostknife fish yesterday, and was told he would be fine in my cichlid tank,in fact they had them in with convicts in the shop, anyway, I went to the shop today and when I returned my ghostknife was minus a tail,poor fella. I dont have much experience of cichlids and went on the shops advice. now , naturally I feel like **** about it and of course moved him immediatly to my gourami tank where he is having some r&r question is will his tail grow back and which tank should I keep him in?