Tbar did you get a lot of rain and muddy up your water? Right after that 3 1/2 in rain we had my water muddys to about 12 inch visibility and the cnbg feed slows way down for a couple of days. I have noticed this several times on my pond.
No. We have had only had two 1/2" rains out here recently.
I am getting a bloom right now though that has visibility reduced.