Pond Boss Forums AQUATIC VEGETATION Balance of plants in the environment Grass Carp: Good or Bad?

Fertilizing to prevent unwanted plants can be pretty tricky. It is quite possible to end up fertilizing the very same plants you don't want. Or you might encourage a nice thick growth of filamentous algae, aka pond scum. I believe to have any chance of this working, you need to time things just right in the Spring to get planktonic algae to grow before the plants get started, so that the plankton bloom blocks light to the pond bottom. Definitely not a technique to adopt without careful study (and probably trying something else first, IMHO).