SPS losing its skin

[KCNano23]

I recently moved my tank and started to notice my SPS's are not looking to good. I had one go completely white and now this one is starting to shed. Anyone have thoughts on what caused this?

I will post my water parameters shortly

 

[Diesel]

SPS like stable parameters and probably due to the move it was slightly off and cause this RTN.
Nothing you can do than frag into the healthy part and see if that survives but it will be tough once it started.

 

[KCNano23]

Here are the parameters:

Alk - 10.007 dkh
Calcium - 452ppm
Phosphate - 0.00ppm
Phosphorus - 0ppb
Nitrite - 4ppb
Salinity - 1.025
Temp - 78 degrees
PH - 8.0

 

[Diesel]

Here are the parameters:

Alk - 10.007 dkh
Calcium - 452ppm
Phosphate - 0.00ppm
Phosphorus - 0ppb
Nitrite - 4ppb
Salinity - 1.025
Temp - 78 degrees
PH - 8.0

ALK is a bit on the high side with the low Po4.
What's your No3?
And seeing you have nitrite, how long is this tank running?

 

[KCNano23]

So it has been running for 1 month with the new sump/fuge. But over all it has been set up for a few years. I will say this is the first time the tank has had a refugium.

 

[Diesel]

The sump might have something to do with it but I go for the move.
Did you move from one tank to another?

 

[KCNano23]

No it's the same tank. I did recently switch from instant ocean salt to Red Sea coral pro.

 

[KCNano23]

Also nitrates are at .000ppm

 

[Diesel]

Moving tank, switch from one salt to another, having high ALK reading on low Nutrients isn't the best balance for SPS.
When others chime in they can back this up.
In my tank I could grow SPS encrusted on the sand bed as stable everything was but I tested daily on ALK and No3 as these two needed to be spot on everyday.
Than again SPS are weird corals hence........... every coral is weird.
Many threads on here sometimes you can't explain why it goes from awesome one day to total destruction the other and everything between.
I had SPS just doing the RTN tango overnight while the other 90 colonies were fine and water parameters didn't change a bit, even that our 150.000 friends on R2R can tell you that.

 

[drawman]

Nitrates and Phosphates are low. You have bottomed out on both of them. I would try to raise them and just know that it may get worse before it gets better. Acros tend to hold a grudge.

+1 with what Diesel said with the Alkalinity being high as well. That makes low nutrients even worse.

 

[KCNano23]

How do I increase my nitrates and phosphates?

 

[KCNano23]

Could the chaeto I have be taking to much out?