Hello all I’m new to this site and also my tank. I bought a used 54 gallon corner tank off Craigslist and came with everything needed to get it up and running, including all the rock and algae problem. Almost have all the algae under control. It came with one coral that originally looked like a GSP but after 2 weeks of being in the tank it started to come out and show its self, and to my surprise no green. More purple/pink. Any ideas or information would be great. Thanks in advance.