Also, is this your first tank?  If so, I'd recommend against a mixed LPS/SPS tank.  Experienced hobbyists can pull it off, newbs(like me) can't.  You're basically toeing a line between not too much nutrients(SPS) and not too little(LPS).  I ended up killing any SPS I put in the tank and severely limited any LPS growth/color in the process.

Are you running GFO?  I had very similar issues running too much GFO.  How about other equipment?

If I were to add a coral right now to my tank, half of it up high and half of it on the floor, the top most coral would likely suffer. I only know LEDs though and have learned that they are super destructive to corals.

Another thought: do you have any fish that enjoy corals, like a not reef safe wrasse? Could be something eating some and could be why other corals are okay.

Lastly, tanks are so unique. I have a tank that is "spot on" with numbers that does okay, another tank that is semi spot on that does better. 

Marcos

Fish so far are:

I don't have any equipment running other than a skimmer.  It's hard to tell on chaeto growth, it's at least the same as when I put it in, maybe a little bigger.

I have been starting the corals at the bottom.  I heard the kryptonite like pretty low light and they were already near the bottom when they were dead/dying so I moved them under a shelf and the 2 heads that are left aren't dead, but they're not recovering either.

By the way, I am just throwing stuff out it could be. It could be one thing or a combo of things that are creating the perfect storm of coral death. 

I doubt that a Red Sea tank so new could have a stray voltage problem. That happens when the electrical wire insulation gets old and cracks, exposing bare wire to the water. If that were happening, all coral and fish would be having problems, not just a select group of animals. To test for stray voltage use a volt meter with one lead connected to ground and the other lead in the water. A reading above 40 volts indicates inappropriate stray voltage.

Furthermore, a brand new tank could have a manufactures defect and have a frayed wire without ever touching water. Or, a wire could simply be pinched in a door jam, zip tie, etc. and be cut. :) I'm certain that someone has damaged a wire unintentionally. Anything is possible in an aquarium. 

Powerheads according to the Red Sea site (these numbers mean nothing to me!)

13,600 l/h (3600gph)

main system pump with 4x 2150l/h (570gph) circulation pumps

Anenome has always done fine

purple gorgonian, it has struggled lately as I've had issues keeping it free of algae or cyano

With the SPS, they stay good for about a week at the most before they start bleaching out and then just die.   For LPS, when I put the kryptonite in, there were 5 heads, after 2-3 days they starting shrinking, and eventually shriveled up and 3 died, and 2 still have flesh but as you can see from the pic they are very sad.  I moved them a couple or so weeks ago to below a shelf so they have less light, and in the last day or so they actually seem slightly bigger to me. I have a sad favia that I've never seen anything extended from, and it has faded.  The torch I put in just died, head by head, kind of disintegrated.  And then like I said, the duncans and blastos have done ok, just faded a little in color and haven't grown at all.  The duncan actually has grown 1 new head, but I am told they grow pretty fast, and those have both been in there since 6/27. I have a mushroom that has made 2 babies, and the zoas have seemed to be doing pretty well, but lately not open as much.  

ive been looking at you #'s and what concerns me is your nitrate and phos.  i think with those being zero and you Alk at 9.5, your burning your corals with the amount of light your tank has.

I would try to "Dirty up the tank a little" as they say. Start by lowering your alk to around 8.0dkh. I see that you really dont have a very big fish load for your tank size. Get some more fish!!! Thats always a  fun thing to do. Then feed them good. I feed my fish 3 times a day, with a varity of frozen foods and blackworms.

You want a little or phos. and nitrate. I keep my nitrates at 5-10ppm salifert test, and my phos. under 0.1 on my hanna checker.

Your calcium is fine where its as well your mag.

lower your alk slowly by not changing your water until you get to around 8dkh. but do keep an eye out for calcium and mag, and dose as those accordingly. This will also help "dirty" your tank a little in the process.

Thats all i can think of right now.

p.s. I hang out w/ Rusty at benepets for all you who i am. He can vouch for me. Thanks