I've had these blow pop zoanthids for 4 weeks now, and I can't figure out why out of the 10 polyps I have, only 3 stay open thru the day, I have noticed that when the lights begin to ramp up from moonlight to full intensity all of them start to open and stay open for a couple of hours, by the afternoon only the same 3 polyps stay open. Would this by any chance indicate either too much light or too little?, can't figure out where to place them. Flow is the same in the morning vs afternoon. I have given them a close inspection and dip but don't see pests. Currently have them about mid height. I have other zoanthids and candy canes that are happy, at about the same height or lower.