Wow, this is an old thread
You'll all be glad to hear my GSP's are doing well.
With my new camera I should be able to post some nice pics of them.
Wind,
My polyps are doing well in a moderate to low current. They're about 6 inches from the surface of the water under 32 Wates of 50/50 PC lighting.
Thats makes for some pretty low lighting compared to a lot of types of corals.
You may also want to think about other corals near your GSP's. I just moved my Colt near some Anthelia polyps for about 2 weeks and about half the polyps have melted.
Neighbors might be letting off some bad mojo the GSP's don't like.