I am new to the saltwater side of aquariums and was wondering what corals I could keep. I currently have a Marineland double bright LED fixture and dont have the extra cash to go out and get a coral fixture. A friend gave me some button polyps that seem ok with my lights and I have a few mushrooms that are thriving as well. I would appreciate any input as I would like to pick a few more things up to liven up the visual of my tank and am not sure what if any i can keep successfully with that type of lighting.