Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Using algaecides ??

For Filamentous Algae, if you are worried about eating fish out of a pond treated with chemicals, I would stock a minimum of 40 pounds of Tilapia per surface acre within the next week or so. That should allow you to not have to teat the pond with any chemicals for algae control, provided you don't have a 15%-20% or more surface coverage of algae now.

For myself? I use both chemical and biological controls in my personal pond. I apply chemicals where needed according to the label, and have no qualms about eating fish out of my pond.

I figure that with all the testing and regulations that are in place, I have more serious things to worry about as long as I read the label completely and follow the directions.