We have had this colony for two years. Although it has grown, it has been mildly pale the last several months. Our tank par was <200 and we have low phos and nitrates so I have been slowly increasing light intensity, have turned off the skimmer for six hours a day and have been feeding a little more. I had one day of low ph (to 7.77) with stable dKH in the 8’s that corrected with relatively small water change. Mg rose to 2100, has been stable for years with no change in amount added. Recently sent water for icp analysis (2weeks ago) and everything ok (mg ok at the time. I turned the mg infusion down 20%. Can I do anything to save this coral?
