A pond has everything necessary to support algae and weed growth: plenty of water, sunlight, and nutrients. Some ponds offer more sunlight and nutrients than other ponds, causing the fight against them to be difficult.
Just because there is something in the pond doesn’t necessarily mean it is live growth! The best indicator of this is the color. Dead growth will be brown, while new growth will be green. If you’re seeing brown algae after a treatment, it could take a little time for that to “go away” and drop to the bottom of your pond. A good, hard rain should do the trick! If no rain is on the radar, then spraying it down with a hose should help break it up and drop it to the bottom.
