well as far as I can tell the gsp still looks pretty good, I wouldnt worry about the little bit of brown on it. I am not sure what the white stuff is that is on the frag itself though. You might want to turn the powerhead away some, they do like flow but I think that might be to much for it. Its a good sign that you see a little bit of green coming out of one of the stalks. I think its going to be just fine, its just taking a little longer than usual but once it does open up you shouldnt have anymore problems with them and they will grow like crazy! so like I said try moving the powerhead some so its not blasting them directly and see if that helps. good luck, hang in there and keep us posted.