Winter Pond Management in Ohio: Keep Pumps Running, Use Barley, Test Water

Owner in Ohio (2,800 gal, skimmer, waterfall) gets conflicting advice: remove pump vs. run all winter. Lost fish to herons, bad winter, algae. Asks about pump, water changes, barley straw.

Winter Pump Verdict: RUN IT

Running the pump maintains biofilter bacteria, prevents stratification, and keeps a gas-exchange hole. Shutting it down kills the biofilter and risks turnover kills.

Winter Checklist

• Run pump 24/7 (remove only if impeller freezes solid).
• Add aerator/air stone as backup.
• Keep a hole in ice (de-icer or pump flow).
• Don’t feed below 50°F; switch to wheat germ at 50–60°F.
• Sweep snow off ice if safe (allows light for plants).

Spring Startup

• Partial water change (20–30%) only after testing ammonia/nitrite.
• Don’t scrub—biofilm is gold.
• Barley straw: liquid extract > pellets > bales. Anchor halfway in/out.
• Microbe-Lift Spring enzyme accelerates leaf decay.
• Restart nitrogen cycle: watch for nitrite spike at 3 weeks.

Fire the Bad Advice Store

Employees selling unnecessary products. Know your pond’s needs; buy only what fits your plan.