Yellowish spots on montipora

[Styliztic0753]

Any idea on what would cause these yellowish spots? My monti used to look great, bright color, full polyp extension. I had to go on a reduced lighting schedule to get rid of some hair algea issues and it still hasn't recovered.

[Spslvr]

looks like die off and its quite pale, did you by chance use anything to assist with your algae control? any additives or "special" remedies?

[Styliztic0753]

Nothing special just limited the lighting to 4 hours a day for a little over a week, ramped up the GFO and carbon to get rid of organics and PO4. Scrubbed all the rock and did a few water changes. All the corals in the tank got pretty stressed during that time frame with the lights out, I noticed some die off on the others as well.

Just wanted to make sure it wasn't a pest or anything else. So it could just be die off from the lighting change I suppose. Hopefully it will may a comeback with the lights back to normal schedule.

[v10king]

Originally Posted by Styliztic0753

Nothing special just limited the lighting to 4 hours a day for a little over a week, ramped up the GFO and carbon to get rid of organics and PO4. Scrubbed all the rock and did a few water changes. All the corals in the tank got pretty stressed during that time frame with the lights out, I noticed some die off on the others as well.

Just wanted to make sure it wasn't a pest or anything else. So it could just be die off from the lighting change I suppose. Hopefully it will may a comeback with the lights back to normal schedule.

Probably related to the increase in gfo or carbon. I know the only time I had rtn in my tank was when I turned on my gfo reactor. Never again.