The other day I bought a green star polyp frag, but it is a very weird frag. The mat is deep purple and has the consistency of thin cardboard. The polyps themselves are hard when closed, and when open they have white centers with pink tentacles that fade to VERY neon green tips. Under the mat...

Hi everyone, I have a 12g nanocube that's been running beautifully for years. One of my favorite corals are my green star polyps. They have been doing well for a long time - two years or so - and spreading throughout the tank. Lately though I've noticed that they don't seem to be growing as...