Pond Boss Forums MANAGING AN EXISTING POND Fertilization Algae

Bill- I can't say that I'd recommend fertilizing the pond if a filamentous algae "problem" already exists. The additon of nutrients at this time of the season could make the problem worse. Ideally, fertilization should be initiated earlier in the season (mid-60 water temps) so phytoplankton populations can get a jump-start, before filamentous algaes wake up from their wintertime nap. Maintain an existing bloom by incremental bumps of fertilizer - as needed. But proceed with caution if you have a fair amount of filamentous algea present.