Thanks for all the comments. The palys have become one of my favorites, because the offspring are a very nice solid blue. I suppose it's time to give them a name... how does "buttery blue people eating palys" sound? lol.
Redfish: yeah.. i can't figure out why my rocks won't grow anything on them. no coralline, no nuisance algae... nothing. Frustrating, but nice at the same time.
quy: yeah, the dark blue ones are the tubs. At least I hope, otherwise I got ripped off =D