I bought a rock with 3 Ricordia on it about 3 weeks ago. I had them placed on the top of my reef close to the lights but they didn't look happy so I placed them on the sandbed last week but they are even more shriveled. A couple of factors may be causing this; 1. I changed two PC bulbs out last week, 1 50/50 and an Actinic. I still have two more bulbs to change out. 2. there is decent flow where I placed them on the sandbed. Any help would be much appreciated as I don't want to lose them. My lighting is 144w in a BC29.