Acropora great PE at night

[pomoev]

Hi. I looked at my tank today at 2am and found 2 acropora corals had much better polyp extension than I usually see during the day.

What does it tell me? Does it mean the light/flow settings need adjustment to improve PE during the day time? Or is it just these two particular corals prefer feeding at night?

 

[KrisReef]

Night feeding. The planktonic critters migrate up from the depths at night and coral put out their feelers to see if they can engage in a free lunch. They are happy if they are feeding, ime. Good time to put in some planktonic food items if you are up late.