I have had a red Caribbean gorgonian and yellow Caribbean gorgonian in my low light tank for several months. Both have doing very well. Two weeks ago, the yellow stopped opening up. The red is beautiful. I moved the yellow next to the red hoping that the new location would help. No luck. There is no decay or algae on it. No other inhabitants, spiny oyster, sponges, tunicants or sun corals show problems. The tank is fed a variety of food, phyto, rotifers, baby brine shrimp and oyster feast. Anybody have any ideas on how to get it to open again?