Prairie Creek Reservoir near Muncie is having it's largest and earliest blue-green algae bloom. The water has a strong "dirt-type" smell. Indiana-American water company(who own the reservoir) has obtained a permit from the state to spray portions of the lake with a copper based algaecide. I am wondering if this or the algae will have an adverse effect on the fish. Has anybody had this at their home lake?

I don't know about the algaecide, but I do know that a bad algal bloom can cause fish kills. Simply put, what happens is when the alga die they begin to decay which uses up the DO in the water, leaving none for the fish. This is in a very bad case, of course.

Hopefully you get some more responses....

Shouldn't unless they spray too much.  Its the same theory he stated about a large bloom...  if you kill off too much algae with the spray you'll have a huge spike in decaying matter.  This will reduce the oxygen in the water.  Normally if its a huge problem, you kill some, wait, then kill more later.