Lobo color fading

[SuncrestReef]

I’ve had this lobo for over a year with no problems, but for the past week one lobe has been fading in color. I haven’t made any changes in equipment or husbandry, and I target feed ReefRoids once per week. All parameters are normal and have been stable. My other lobo is fine. Any thoughts?

Temp: 78 F
Salinity: 1.026
pH: 8.0 - 8.4
Alkalinity: 8.2 dKH
Calcium: 440 ppm
Magnesium: 1350 ppm
Nitrate: 8 ppm
Phosphate: 0.07 ppm

 

[BlennyTime]

Any changes in your lighting? Looks like it might be bleaching.

 

[SuncrestReef]

Any changes in your lighting? Looks like it might be bleaching.

I did add an additional light about 5 months ago since there was a bit of shading due to coral growth. But would bleaching suddenly start that long after making a change?

 

[Billldg]

I would send off a water sample and have it tested.

Parameters look good which is why I say send a water sample to get tested.

 

[SuncrestReef]

I would send off a water sample and have it tested.

Parameters look good which is why I say send a water sample to get tested.

I forgot to mention in my original post that I also sent in a water sample for ICP analysis and it came back normal.

 

[Billldg]

@ReefSquad, what could possibly be happening?

 

[Billldg]

Do you run carbon to help keep the water clean and if so what is you schedule for changing the carbon. I think you do run carbon, but I may be wrong.