What is this medium can you start seeds from it is it a hydro medium only?? Give me some info on it i been lookin.

NOT MY PLANTS!
MeanGreenEye420 Reviewed by MeanGreenEye420 on . What is this???? "Pic" What is this medium can you start seeds from it is it a hydro medium only?? Give me some info on it i been lookin. NOT MY PLANTS! Rating: 5