I have the condy anemone in 10g tank with some corals for more than year, no problems from the anemone side. I'm keeping it just like any coral - without touching the neighbors. But yellow polyps, when covered the rock with anemone, left marks on anemone tectacles - better to keep them away, no direct contact.
Was the anemone worth having it - disputable When I bought it, it was snow-white with purple tips, 4" diameter, real centerpiece.
After a months, it become tan colored, even brownish - totally uninteresting, and, as had read on the forums, this is the normal color. Under the good light it opens to the 7" or more in diameter - this means this dull creature takes too much place in my tank, and I can't even give it away to a bigger home - all want the show piece, not that, what it become.
It requires 70W+ for 12" deep tanks, not less, speaking from my experience. Mine had direct sunlight for a few hours, in addition to that.
Until it settles in the concavity in the rock, in uplifting flow, the intakes of powerfilters or powerheads, as well as heaters better to keep covered by plastic mesh.
I really like it, but have much more interesting corals now, in the limited space.