pectinia coral & Coraline

[bwells]

So my Magnesium got out of control and went up above 1500ppm. I know that may not be off the charts, but I also think the Pectina didn't like it. The flesh on my Pectina receded about 1/4" on one lobe and on one edge. I can see red Coraline Algae has grown on those exposed areas where the skeleton is visible.

My question is, what should I do? The coral has never done anything to speak of. It pops a sweeper out every so often, mostly at night. But in 4 months, I have seen no growth and in the last 2-3 weeks, this flesh receded and now I am worried it may be dieing.

Should I trim the tips of the skeleton to remove those exposed areas that have red Coraline on them? Or would trimming be very bad? Should I try moving the Pectina down lower to a ledge to see if that helps? Should I do both or should I do nothing or should I do something else all together?

Thanks

 

[ReefCowboy]

I also have had success with alien eye pectinias in the past with very little care for them. When I ran t5s I had it sitting around on the sandbed and it was fleshy and seemed like a hardy coral. I switched to led and although par is still there with other corals responding well, it receded slowly until it was so ugly I had to remove it and place it in my sump. It's dead now, but I kind of understand why live aquaria lists them as difficult care coral.
Sorry for not answering to your questions, but I would leave it alone and try not to stress it.
From my experience once they start receding is downhill from there