Can some one please tell me how to get this dang moneywort to root. I bought it from pets mart and it came as a "bunch". Just cut stems tied together. I have sand substrate so I just plopped it in there and some came out and floated to the top so I have some stems embedded in the sand throughout the tank. Is it just a waiting game now for it to root and when ever a piece comes out, just put it back in?