SPS help

[lorenz0]

ok i am new to this whole SPS deal. I tested my water and everything is good and my calcium is at 420-430ppm

how long should my lighting periods be?? could having my lights on for to long be some sort of effect???

but they are being dosed with Pohl's coral vitalizer and a few drops of reef pure concentrated calcium suppliment each night.

so here is the story, i bought this small acro frag 3 weeks ago and it seems like it doing great. has colored up ever since i purchased the new lighting (nova extreme pro) and the monti is doing great as well. now i was told that birds nest is the easiest SPS out there but to me it seems like the polyp extension isn't that much. i did move it lower in my tank but hopefully everything pulls through till sunday cause i am going to pick up more rock so i can mount these frags higher in the tank. my real concern is this new colony that i purchased on sunday. i had it about an inche from a power head and that area of the colony looks like it is bleaching. here are a few pictures please help a fellow sps newbie out