A slow death - and Im not sure why, pls see my tank logs

[lookitsNemo]

I have been seeing a slow death of my corals since moving into a bigger tank

I see the only major difference in this tank journal and my old tank journal is the Nitrate that went unchecked and climbed up to 10ppm. now I have the algae scrubber and macro algae growing and the NO3 is down to 1ppm. YAY

but the corals are still slowly slowly dying, I guess I have lost about half. The LPS died first and now even the zo0anthiods are starting to hide?

here is a link to the tamk journal,

https://onedrive.live.com/redir?resid=64C111F092A4ADFC!1156&authkey=!AA83EyoA8J25qUw&ithint=file%2cxlsx

 

[SoloGarth]

Please post info about tank lighting chemistry ect.

 

[Sk8r]

Is the new tank deeper? If so, your corals may not be getting the light you think they are, and visual appearance is no guide. I had a 250 watt metal halide transferred from an 18" deep tank to a 30-plus deep tank, and finally understood my problem when I saw low-light sponges growing in the open on the bottom tier of my rock. Water diminishes the intensity particularly of the short (red) wave length light on its way down. The blues penetrate better. I was using a 250 watt MH with, exacerbating the problem, a 10000 k Ushio bulb, which tends to output more toward the reds than some.

I changed my lighting to a fixture (Radion Pro) that can reach that depth, and am seeing improvement.

 

[zachfishman]

Pictures will help. What new pieces of equipment were added (fuge made with a dollar store plastic container by chance?), any new LR (could there be hitchhiker crabs eating your corals)?