What are they? Bird deterrent ball covers are 100mm diameter UV stabilized black hollow plastic balls, manufactured in High Density Polyethylene.  The bird control balls float on the surface of a liquid, automatically arranging themselves into a close packed formation to completely cover the liquid surface.
  • Simple to install
  • Maintenance free
  • Proven track record with US dept of Fisheries & Wildlife
  • UV stabilized HDPE, with over ten years life expectancy
  • Accommodates
    • Changes in liquid levels
    • Floating platforms
    • Aerators
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