Welcome to the forum Northband!
What kind of fish do you have in the pond? Is the entire pond lined with the pea gravel? It kind of looks like Calcium has dissolved into the water and made it slightly milky looking. If it's calcium, it will eventually precipitate out.
If you have Koi in the pond, they got more active as the water warmed, and will have reproduced, adding many more mouths rooting around on the bottom, but whatever was stirred up, should settle out in the jar.
Pac27 is a safe alternative algae treatment to copper products, or Blue Tilapia....contact Bill Cody here on the forum for those.
The clouding could be a result of the bacterial reproduction that was added, but is more likely just coincidental to another unknown cause.
