GSP Turning Brown

[Pavatt1]

Hey everybody! This is my first post on here and I need some advice/opinions.

I've had this GSP for about 3 years and it's grown relatively well considering how little attention I gave the tank.
It has never had great color though. I've recently swapped over to a single AI Prime over an IM 15gal Cube. It seemed to get a little better colorwise, but obviously still not ideal. The light is mounted 9" above the water and its running the Saxby profile. I'm not sure if its getting too little light or possibly too much??
Parameters are:
Ammonia- 0
No3- 0
No4- 5
Po4- 0.03
Alk- 9.2
PH- 8.2
Cal- 410
Mag- 1320
Sal- 1.025
Temp- 78

 

[Subsea]

I don’t think that you have too much light. However, I don’t see the brown. I do see pink as the encrusting part of the polyps.

 

[WalkerLovesTheOcean]

You may just have some special variant. It looks healthy to me. Sometimes low nutrients can cause colors to fade and turn more brownish for some corals, IME.