Ok...I recieved a good amount of GSP in a thermos trade awhile back and everything opened great! However they are not very green. In fact they are brown. I currently have them on the sandbed in my 46gal with 192watts of pc sitting over the tank. Whats the deal?
I have the same setup as you and i keep my gsp about 8 inches under the lights and they stay green, I had them lower and they turned brown. They are also in med-high flow.