My green SPS Turning Yellow

[MHG]

So lately most of my sps have been looking pretty good. Well except my millis but that's another thread... I have a hairy green stag and a green birds nest that are starting to take on a yellowish tint.

My nitrates are .50
Alk is 8.5
Iron is 0
Potassium is 420
Mag is 1500
Calc is a bit high at 520
Phosphates are 0
iodine .04


My dosing pumps are off and I am just dosing kalk. I was dosing alk and calc but I could not keep my ph up so I went back to calk. Corals seem to like the higher ph better...

My lighting has not changed. Most everything is pretty stable. I have been supplementing XTRA twice a week, amino acids daily. I have been dosing iron but still testing zero...iodine twice a week.

 

[SULLY736]

Have you changed anything else in the tank?

 

[SchnitzelReef]

How long have the pieces been in ur tank? I've had new SPS take a month or 2 and then slowly start changing colors.

I always assumed it was because of my lighting.

But if these have been in ur tank along time, then idk what to tell u


Sent from my iPhone

 

[MHG]

Been there for a year... Nitrates were always zero but now I have been feeding a bit heavy to get the up bait as my growth was poor. Now I get good better growth. The tank has been quite stable and I have not changes much. I know that yellow changing to green are a sign of overdose on some zeovit products. But green to yellow? Not sure....