I did something yesterday that I know was not the best thing to do.
I have a 58 gallon tank with 5+ coral; snails; yellow tang;green chromis; and 2 oscellaris. The tank is doing great. But yesterday, I fell in love with a baby blue tang and bought it. The salesperson said that it would get along with the yellow tang since it was a different color and they have been getting along fine. However he said that I would probably have to remove it from the tank after 2 yrs because it would become too big. It is so cute now and is smaller than the smaller oscellaris and all the fish get along swimmingly. Did I make a mistake?