I think a factor in all this could be an imbalance with Nitrate and ALK. I've noticed that in my low nutrient system, my corals looked the happiest with ALK in the mid 7's. I'm currently trying to get it down to 8, to see how things look.
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I commented on this on the first page, Nitrogen Flourish.What product do you use for this? Can I get a specific name? Thanks in advance

Turning off your skimmer is a option, but why beat around the bush? I've been dosing Nitrogen flourish (potassium nitrate) for years and have had great success.
The problems I've had with turning off my skimmer is trouble with my ATO when the skimmer turns back on. The sump level changed after the excess water from the skimmer evaporated and my ATO has a auto shut off after its been on for a prolonged period of time trying to make up the water. Also the loss of oxygenation not peaking pH. I've also tried over feeding all sorts of things, which had some strange results on some triton water analysis, excess lithium. Over feeding can have unintentional effects based on certain foods and their source.
My suggestion, just add exactly what your looking for, no need to take a windy path.

