Zoanthids turning brown?

[JakeDaReefer]

I will attach a photo, I have a 32.5 Fluval Flex. With the Marine 3.0 which I know isn’t the best but thought would do for now with soft corals, I have 4 zoas in different locations and all seem to be doing fine except this one which has gone from a light green to a brownish, everything else is doing great and my nitrates phosphates and pH seem to be doing good, what could the issue be?

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[Kooma]

Test results? Usually that is a starving zoa in my experience. Color’s fade as they run low on nitrogen.

 

[Mr. Mojo Rising]

I would try moving it, as you mention others are in different spots, this one doesn't like his spot. Some pally's/zoa's like higher light so maybe move it closer to the light.

 

[JakeDaReefer]

Any advice on how to do that if plug is superglued to rock?