Ok, think I've got it now. All of my adult berghia have passed onto the great unknown, hopefully full of aiptasia. I wasn't sure if any of my egg clusters were hatching. A freind of mine just kept saying, "be patient". Well the patience is finally paying off.
I thought the tanks were devoid of any berghia babies. Instead of emptying the tanks out and cleaning them up, I just left them fallow and topped them off from time to time to the point that I almost forgot about them. Well the other night I'm out in the fishroom cleaning up and noticed, nudi's in the berghia tanks.
For anyone growing these guys out from eggs. Be patient, they are so tiny when they hatch, you can't see them for awhile.
Here's what I'm using to grow them out and have been since day one. I use a 5 gal acrylic tank, with a heater and left over water change water from my display. No air pumps or power heads, since these can kill the nudi's. I do not move rocks with aiptasia over to my nudi breeding tank since pests can and do transfer over from the rocks. Bristle worms, amphipods, and who knows what else will eat your nudi babies before you ever see them. As for feeding them, I was siphoning aiptasia off my sandbed in my display tank. Bad idea. No telling how many predators of baby nudi's I sucked off the sandbed while siphoning aiptasia. Now I just use a pair of hemostats and grab aiptasia by the base then pull them out and toss them in the berghia tank. Yes, this leaves the aiptasia foot in the display, but if your feeding berghia, you'll need them to regrow anyway.