Algae Control Without Plants: Dealing with a Plant‑Eating Groundhog

The Challenge

A pond owner struggles with algae but cannot keep plants because a resident groundhog eats everything, including aquatic vegetation.

Protecting Plants (If You Want to Try)

• Cage or fence the pond or individual plant pots.
• Use wire mesh cages around marginal plants.
• Consider a separate, protected plant‑filter pond that overflows into the main pond.

Non‑Plant Algae Control Methods

• Mechanical filtration – Remove suspended algae and debris.
• Barley straw – Releases natural peroxides that inhibit algae.
• UV sterilizer – Kills free‑floating algae cells.
• Algaecides – Use as a last resort; follow label carefully.

Resources

A comprehensive list of algae‑control options is at fishpondinfo.com/plants/algae2.htm.

Bottom Line

Even without plants, a combination of filtration, barley straw, and UV can manage algae. Protecting a few plants with cages is also worth attempting.