Perculas don't host in bubble tip anemones in the wild. They host in other anemones like the H. magnifica, H crispa, S. gigantea and S. mertensii. That doesn't mean that they won't though.
I took care of a pair of Onyx perculas at the store I used to work for that took to green bubble tip anemones right away. I threw in a rose bubble tip anemone and they hosted in it too. The rose and green bubble tip are the same species.
If they don't host in the anemone right away, have a little patience and maybe in about a years time they will.