I feed cyclopese often. A LFS
makes their own and sells it in a frozen candy bar shaped tube.
I feed it in conjunction with mysis or brine. The coral love it, and you can see them throw their polyps and tenticles into the water column when I add it. I also give them oyster placenta, the refigerated kind.
I wouldn't feed only the cyclopese to fish as I think it is too small for them alone, but I do let it into the tank totally thawed for feeding things other than fish.
We have been feeding it for 6 months every other day, and we have 0 PPM