I bought a plant at a local PetSmart (I know, I know) tonight. It's an Anubis so I think I might be okay. Anyway, it came in a plastic tube, and inside that is a little plastic cylinder about 2 inches in diameter and height. Most of the plant is sticking out the top, and all the roots are inside the cylinder in some sort of gel. The packaging says it's ready to plant in the cylinder. Does this seem right? Should I tear apart the cylinder and plant it into the sand in my tank?