Quick Guide to Removing Green Surface Algae

First, Identify the Algae

• Fluorescent green = likely cyanobacteria (blue‑green algae). Aeration breaks it up.
• Dark green = typical planktonic or filamentous algae.

General Solutions

• Add aeration (fountain, waterfall, air stone).
• Increase plant coverage (floaters, marginals).
• Use barley straw or UV clarifier.
• Reduce nutrient input (feed less, remove debris).

Size Matters

Treatment differs for small vs. large ponds. See full guide at algae2.htm.