H2O Life?
Yes, I've tried that. It's okay. They also have Cyclops and stuff like that.
http://www.h2olifefoods.com/products/coralfeeder.html
It's very affordable.
But the frozen prawn eggs are really a hit with the gorgs and sun corals. I put it in before I take pictures to get everybody to open up.

This is what I'm after :
http://nutramar.com/ova.html