After reading up on Rodeo, Aquashade and copper sulfate, I conclude that the Aquashade is a bit late for my current pond growth. That is the grass and agae mat is already grown, so I can only prevent further growth. Right now I'd say 75% of the pond is covered!
The Rodeo appears to be safe to the aquadic life, but for the oxygen depletion as Larry pointed out. BUT the MSDS lists the lethal concentraction (LC50 and EC50) for the chemical for various organisms (fish). So care is still needed to not exceed the limits and start killing fish.
Copper sulfate also requires attention to concentration...so I'll have be a chemist to get this all right without having the EPA show up at my door step! LOL!
Thanks guys...hopefully next year my pond won't look like a swamp
