Will my NPS gorgonian eat my photo gorgs ?
 

I just added a nps gorg to my tank... it is touching my regular photosynthetic gorgs... Will they eat each other?

Their interaction will depend upon the two species and whether or not they're competitive in the wild. Some species will completely ignore each other, and I've seen photosynthetic branches reach up through non-photosynthetic colonies without a problem... but I've also seen where two types meet and the branches of one turn dark and wither off.

Just keep an eye on it, and you'll see very soon if they're not compatible.

Agreed. Probably won’t bother eat other.
But now you have to feed the nps gorg.

Also depends on current. In really strong flow they may rub each other and cause bald patches.