I was looking at the selling livestock forum not to long ago and i came across some picstures of superman montis, sunset etc...and they were all ecrusted either on a bare bottom or sand. Now when i have receved frags of encrusting montis they are on plugs. My question is can i put them on the substrate on the bottom of the tank and will they encrust onto the or would it be better to put them on a rock or something. Probally a dumb question but im just wondering beacuse everytime ive recieved a monti it only spreads on the frag plug ad stops there. Any help is appreciated. Thanks!