Geese and Koi Together: Filtration Nightmare

Two Chinese geese + four koi. Want a decorative, functional pond for both.

Bad Combination

• Geese: Eat ALL plants instantly. Produce massive nutrient load (poop). Aggressive, territorial.
• Koi: Also eat plants. Need pristine water.
• Result: Green soup, no plants, high ammonia, sick fish, angry geese.

If You Must

1. Massive Filtration: 3x normal (large bead filter, bog filter, UV).
2. No Plants in Main Pond: Geese destroy them. Use floating islands (caged) or separate planted bog.
3. Large Aeration Fountain: Center-mounted, high flow. O2 + aesthetics.
4. Separate Zones: Fenced goose area + netted koi area. Shared water, separated banks.

Real talk: Build a goose pond and a koi pond. They have opposite needs.