First-Time Pond Owner: Winterizing Basics

New homeowner with a backyard pond and waterfall asks if the pump should be turned off for winter.

Critical Rule: Maintain Gas Exchange

Fish become dormant but need oxygen and release toxic gases (methane, CO₂). The pond surface must not freeze completely.

Simple Solutions

• Floating de-icer keeps a hole open; costs ~same as a refrigerator monthly.
• Air stone adds oxygen and helps keep ice open.
• Pump decision: If waterfall risks diverting water out of pond (ice dams), turn it off and use aeration instead.

No need to heat the pond—just prevent a total seal.