Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations I'm Lost

We spray Glyphosate directly on emergent pond plants, it's not harmful to fish or invertebrates if the correct version is used.
Isopropylamine salt is what you want. Rodeo is specifically blended for use in/on water containing fish. Glyphosate is available with 3 other types that are NOT good for fish. Brand Roundup has other chemicals that can affect aquatic organisms depending on how it's used, so be sure it's isopropylamine salt as active ingredient.