Is there a clog or not?

When i turn the skimmer valve to allow only return from the "troubled" skimmer, I am seeing a good flow, but looking at the skimmer, i see no movement. The other skimmer actually looks like its draining water into the line. Any ideas?

I am an absolute pool newbie in every aspect. I am hoping to gain a ton of knowledge from this forum.

Thanks in advance

Matt