Thanks Bill, I should have said sediment instead of clay, as I realized it wasn't going to be clay while I was writing and changed the title but not the question. With the lack of alum or gypsum to test for inorganic suspension, I thought I would try to rule out organics with the bleach, I've seen a couple of posts here on using this method.
What I'm seeing is a green sediment falling on the bottom near the shore, and on some new structure I put in for fatheads. I don't remember seeing it before, and it seems heavier than I would think a algae bloom alone would be. Hope that makes sense.
