Whats up with this SPS Frag?

[ps2cho]

I transferred all my SPS from my old 60G into the new 40 breeder...

1.025
8.4 dkH
410 Ca
1300 Mg

0.00 NO3
0.04 PO4

I KNOW my NO3 is an issue and I started dosing KNO3 as we speak, but I wanted to ask, does this SPS look like its ticked off because of the zero nitrates, or could it be something else? It still has polyps, although they aren't all open.

What do you guys more experienced think?

Here is what it looked like a year ago (dont have a more recent pic..)

This coral has been through the WORST...Almost died, then recovered and grew over the skeleton (as you can see in the photo)..grew bigger than before, now gone from totally green to totally purple/red)

 

[Russ265]

I transferred all my SPS from my old 60G into the new 40 breeder...

1.025
8.4 dkH
410 Ca
1300 Mg

0.00 NO3
0.04 PO4

I KNOW my NO3 is an issue and I started dosing KNO3 as we speak, but I wanted to ask, does this SPS look like its ****** off because of the zero nitrates, or could it be something else? It still has polyps, although they aren't all open.

What do you guys more experienced think?

Here is what it looked like a year ago (dont have a more recent pic..)

This coral has been through the WORST...Almost died, then recovered and grew over the skeleton (as you can see in the photo)..grew bigger than before, now gone from totally green to totally purple/red)

loss of greens = no nitrate
specifically from green to brown/violet
bump it to 3-5ppm and wait a week or so.

i have corals that do the very same