I have a 150gl set up that has about 4in of a medium grain sand. I only have two large pieces of Drift wood for decore in it now. I have 2 8in Bichers and 2 6in Plecos. It is so damn empty. I would love to convert it to a heavily planted tank but have no experince with live plants in the aquarium. What kind of plants small to Very large can I use with sand? What do I need to do to the sand before plants can survive? Please help!