Yea andrew, funny u laugh, U just happen to be a troll hybrid. Not quite a troll, but not quite an aquarist. Ur kinda inbetween, but equally annoying. Now, actually, a kole tang MAY be able to floruish in a 30 gallon tank given that it is given ample space to swim in. If it is a 30 gallon long, u could probably pull it off, that is, until it moves to a bigger tank. But persoanlly i wouldnt do it, and never a yellow tang. U have no right to yell at people for giving bad advice either, cuz i rarely, and i emphasize RARELY, EVER see u give any good advice.