I am pretty sure I am close to maxed out on fish in my tank. I have a 120 Gallon long tank. Im running a 30 gallon sump with a 10 gallon refugium to improve filtration. My tank is a mixed reef and my current fish include: Powder Brown Tang(3-4 inch) Blonde Naso Tang(4inch) yellow tang(4 inch) 2 true perc clowns, 1 firefish(1-2 inch) 1 Lawn mower blenny, and 1 diamond goby. I also have around 12 scarlet hermits, 10 blue leg hermits and 10 astrea snails. I would like to add a Achilles tang as they are my faverite but I dont want to over load my livestock. I know there might be a compatability issue with him and my powder brown but I have had good luck getting my fish to co-exist. I am hoping some one has a tank out there with a similar size tank with lots of tangs in it.