Pavona turning brown slightly

Reefer_Marc

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Hello everyone!
I wish you a great start to the week!

I noticed about 4 weeks ago that my pavona is starting to slowly turn a bit brown, as shown in this picture.
20260126_163334_6385A47F-9299-4B4C-B84A-3F26CF3210A3.png

Its starting on the inside, the outside still green.

The coral is in my tank for about 5 months now. It was placed lower in the tank before, i moved it higher up when i noticed the brown, thinking it might be too low of light.

It got a bit more brown since i moved it up.
Current parameters are:
Alk 7.8 (still raising it using balling c and dialing in AFR)
Calc 400
Mag 1400
Nitrate according to ICP 0.1 (dosing now, 2ml a day according to instruction on the bottle, cant remember the brand at the moment)
Phosphate 0.04 (also dosing 2ml a day, same brand as nitrate)
Salinity 1.026

I have two ai hydra 26, pushing full 90w for peak of about 7 hours, with 2 hours ramp up and down, so 11 hours in total. In sync runs a orphek or4 on 50% max power currently.

Is this normal or what could cause it? I hope i provided all the necessary information already!

Here is a FTS with the location of the pavona marked:


20260126_164019_7D5DCB5B-3FC6-4100-96B0-0F7169CC4CB1.png
 
Could be the lower alk and nitrate. I recommend at least 5-10 ppm nitrate and 8.5 dkh alk. My tank has 20-25 ppm nitrate.

IMG_2510.jpeg
 

WHAT MAKES A REEF FEEL ESTABLISHED TO YOU?

  • Stable parameters over time

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  • At least six months old

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