You can also get Xenia to move over onto a small piece of rock by placing the "frag rock" next to the xenia and then aiming a powerhead at the xenia. Xenia typically will move away from water movement....
also...once you've given away all that you can or if there are some hard to reach specimens, I sometimes will siphon off specimens of mine if they're getting too out of control. maybe not the most friendly way, but sometimes they're just little
frags that have started up again and I don't necessarily want them there....
good luck!
