New (first) corals, need some advice/opinions

[SmallFry]

Last weekend I picked up a couple of frags - at last the tank has finally become some sort of a reef.. If you call three frags in a 75 gallon a reef!

I've had a GSP frag for a while, but these are the first hard corals..



Montipora digitata (I think)





Favia (I think based on what I've read in Aquarium Corals by Borneman)



Anyway, I have a few questions.. Mainly regarding placement and colouring. Here is a FTS to show where they are in the tank


GSP is on the sand to the left of centre, favia on the middle level of rock just about at the centre, montipora at the same level just to the right of centre.
The light is 12 cool white Cree 3W and 12 royal blue Cree 3W each side of the fixture. All are being driven at 700mA with 60 degree optics.

The Montipora had no polyps out when I bought it, and the skeleton is purplish. The day after I got it in the tank it had all its polyps out, but they are brownish as you see in the photos.
In the shop it was under a 400W metal halide so it shouldn't have been browned out then, could it not be getting enough light in my tank (would it have browned out overnight), or does it just have brown polyps? I couldn't find any info on polyp colour in my coral book.
If it has browned out due to stress or something, how long should it take to colour up.


Given my lighting, does the placement of the corals look OK, or are they getting too little or too much light?
The only one thing I noticed is that the tentacles on the GSP are much shorter now than they were when I bought it a few months ago.
Could it be that I'm pushing too much light in there - nothing has bleached yet, but I was just wondering..

When I bought it, and now


Oh, and apparently the only place I can grow coralline is on my snails...


Sorry if these are dumb questions, but these are my first corals (and I'm probably/almost certainly being a bit neurotic), thanks,

Rob.