Merry Christmas to all!!! Hey I finally got some money to add some corals to my tank. I have a 54g corner with 260watts of pc lights. I was once told by a bunch of people on here that i could keep sps corals which i forget what that stands for. I have a bunch of mushrooms and zoas and some xenias. I was wanting to put either a bubble coral or a hammer coral or maybe both in my tank (Lord willing my GSM's will host one of them). Are these considered sps and will they thrive in my tank? Thanks for the help!!!