I have so many I collect them in my sump... My LFS doesn't even want them anymore, lol.@F i s h y gave me one a while back and it is 6 now lol. Doesnt bother any of my other nems, but once they get happy, they can be just as bad as BTA lol. But, that is what a nem cannon is for lol.
I can't complain though, I collect everything with tentacles!