Acorn Overload in Large Koi Pond: Management and Water Quality

14,000-gal koi pond in Georgia drought: massive acorn drop from oaks. Asks if toxic or problematic.

Acorn Impacts

• Decomposition consumes oxygen, releases hydrogen sulfide/methane.
• Oak tannins/lignins stain water brown, lower pH.

Management

1. Remove acorns with fine-mesh net on long pole (heavy, sink fast).
2. Check pH weekly during heavy drop.
3. Add activated carbon to filter to remove tannins.
4. Net pond to catch future falls.

Bare-bottom koi ponds make netting easier.