I don't know if you guys already know but I'll share something I did to keep my bubble tip from moving. I have my tank setup exactly how I want it and didn't want to have to worry about this little thing wandering around and potentially bothering other residents. But I know I did want one w/ a gold barred maroon (I just like the interaction). So what I did was take a piece of live rock and drilled a hole, or a pit for the anemone to fit into. I made the hole large enough to acommodate the anemone's base. Just drilled the hole w/ a simple drill and bit. The rock's soft enough to make this an easy task. I've had the anemone in the same rock for a year next month. I have taken the rock and placed it in many positions in the tank the anemone never leaves it's home. I guess there's some sort of comfort factor w/ its base being completely covered. Anyway, I just thought I would share that.