Darn
I’ve been using manyy of those for years and still use copper sulfate.
We use copper sulfate in the pond to kill algae and in the hoof trough for the cows to walk through after milking. It kills foot rot for cows.
I used to use it with sulpher to kill diseases on the grape vineyard.
Maybe I can blame my typing errors on that!
Copper is great if you leave some bare wires in the tray of your a/c system. Kill the algae therein and avoid the clogged drain pipes.