Swimming up-stream in jello like water (or hair gel)!
The circ pump cause of the heavy water phenomena is a good one - I think. (Just like the Endless Pool I expect.) I'll check out where their inlet and outlets are. I know there are some jets around the ends and sides and I have blamed them for my lack of directional control. And the rain changing the viscosity may be valid to some extent too. But I'm glad to find I'm not alone in noticing different conditions. I was thinking my feelings were brought on due to a tiredness of some level.
I haven't had dreams of setting gel or empty pools but I have dreamed of a time when all the water drained from Bedford Basin (behind the pool in the photo) and I was able to find my lost boat moorings as I walked around the "muddy" sea floor. I think this dream was after reading the National Geographic article on the Dead Sea years ago.