Winterizing a Small Goldfish Pond in Texas

Carrollton, TX pond: 165 gallons, 2.5 ft deep. When to stop feeding? Run filter or just bubbler? Need a heater?

Feeding Schedule

• Below 55°F: Switch to wheat-germ food (easier digestion).
• Below 40°F: Stop feeding entirely. Metabolism near zero; uneaten food rots.

Equipment Strategy

• Filter: Run 24/7 unless it freezes solid. Moving water resists icing.
• Bubbler/Aerator: Essential backup. Place diffuser 12–18 inches deep—not at bottom (avoids supercooling).
• Floating De-icer: **Yes, buy one.** Keeps a gas-exchange hole open if surface freezes. Cheap insurance (~$30–50).
• Submersible Heater: Optional. Only if you keep tropical fish or want to extend feeding season. Expensive to run.

Why 2.5 ft Depth Helps

Ground heat prevents total freeze. Fish settle in the warmest bottom layer. Ensure the de-icer maintains an opening for CO₂ escape and O₂ entry.

Key Reminder

Never break ice by hammering—shock waves kill fish. Pour hot water on one spot if de-icer fails.