Chihuahua, yes, you're right, my tank is 300l. The christmas gifts were the catallaphylia and the last fich in the nano.
kdblove_99 and hahnmeister. With Clown Tang do you refer to the Acanthurus Lineatus? I'm sorry but I'm not familiar with some names in english. In this case, I have it since july-august (I think, I don't remember exactly). I know that it will become bigger in the future but I hope to get a bigger reef also. I I can't I will give it to some friend with a bigger reef. By now, it's really good and healthy and there is not any problem with the other fishes...In any case I think that 250g-900l aprox is not necessary for this fish, only for huge animals.