So I've downsized my tank from the 165 6ft to a 120 4ft and need to know how many if any tangs I can keep in the 120. My current tank has 2 yellow, 1 red sea sailfin, 1 purple, and 1 blue hippo. I'm selling the two yellow tangs but would the remaining 3 still be too much? I'll also be moving over my mystery wrasse, goby, lawnmower blenny, 2 pajama cardinals, six line wrasse, pipefish, and 7 blue/green chromis. I'm thinking this will be over stocked with the new tank.