losing sps

[meisel1]

Over the last month I have lost an acro speciosa,a blue tort and and now I have had to frag up my green monti. I think i'm also about to lose my cats paw. I have made changes to my set up over the last month and I'm wondering whether these changes have had a profoundly negative affect on my tank. I installed two mp10s. The units are facing each other offset on the tank sides. I also switched salt to aquavitro salinity from reef crystals. Those are the only chages to the tank that I have made. It seems as tho my tank has shut itself down,minimal pe and not much growth. Before the addition of the MPs and salt change the tank was using .5 dkh daily and +-10 ppm cal,now my kalk not only keeps up with demand but cal and alk levels are elavated. Could it be possble that these changes have adjusted the metabolisim of my tank??? My params as of last night 8:00 pm are

ph 8.34
temp 79.5
alk 10
cal 480ppm
mag 1450
po4 .03
no3 0+
sali 35ppt
Any ideas??? btw tank is lit with maxspect razor peaking at 80%channel A and 90% channel B,,,this has not changed in months. Also my LPS are doing great. This only seems to have affected the SPS..... cheers....Bob
I'm at work right now so my responses may be delayed

 

[Constrictor6090]

Do they look like they are just losing color or is the tissue look like its being torn off?

 

[biggles]

When you do something to upset the corals they stop their normal uptake of alk and calcium so the daily dose that was previously keeping things at a stable level will now raise the levels as the demand is no longer present. Until you figure the problem out lower your dosing and test until you are once again holding stable levels, hope that made sense
Your levels are all a bit high, is that where you run them normally or was there a big rise suddenly when you used the new salt. Might pay to check the levels on a gallon of that new salt mix because i think it has to be a water issue, the MP10's wouldn't be the problem unless you blasted the you know what out of them with constant direct flow. I would suggest perhaps stop all dosing inc the kalk and let your levels drop as you are running a fairly low nutrient level system and 8-9, 1420-40 along with around 1350 for Mg might be a safer level to keep things at.
A rapid spike in alk in a low nutrient system can cause what you are experiencing and since the new salt was the only water change made i think i would look at it as the likely cause. Hope you sort it out sooner rather than later