This might be a stupid question but how do people place coral on their sand bed without it being knocked over constantly by fish or by the flow? Especially for smaller frags.
Good question. I glue mine to some rubble just because I don't like the look of symmetrical disks in the tank and frags are still easy to more around. For corals like Acans, rubble provides space to put different colors together and keeps the "night crew" from moving them around after you have spent an hour orienting them just right to light, flow, etc. ha ha.
Good advice above, Frag disks work well & very convenient Like mikedawg I have a bag full of rubble & dead frag skeletons I like to use, seems more natural looking .