Looking back at this thread, there has been a lot of information thrown around very quickly. I think there are questions that haven't been answered though.
You stated your parameters, but how stable have these parameters been? Have you had any appreciable swings?
How have the LPS you kept died? Slow tissue recession or quick polyp bailout?
Do you target feed your corals?
How often do you feed the tank, what do you feed, how much?
What methods do you use for nutrient control; water changes, algae refugium, phosphate medium, skimmer, etc?
How long has this tank been running?
I see you are addressing your lighting schedule. That may be one item to address. But don't make too many changes too quickly. My method is to make a change, then wait a couple days, maybe a week. Move slowly and take your time. The worst thing we can do is become impatient. I can't tell you how many hundreds of dollars I've lost from being impatient with coral.
