Okay final follow up. The sun coral are opening up all the way now! They are beautiful indeed. It took almost two weeks of constant trying to feed them...now they will open up after the lights go off, (I'll have to train them to open up earlier) I think the way I saved them was by taking them out of the tank and putting them in a smaller container. Then I would take a small cut of cyclopleeze and put in the water. I would wait and their mouths would open. Then I would take mysis shrimp and lay it on the mouth until the mouth started to take in the shrimp (which could take up to 10 minutes!!) THEN I had to wait until each head swallowed the shrimp or else when I place them back in the tank the Nass. Snails would literally take the shrimp out their mouths.
AFTER a lot of hard work I saved these little fellers. I watched them slowly gain their tentacle extension over the last week and they are looking amazing.