Small Fountain Pond: Goldfish Stocking, Winterizing, and Heater Questions

Dallas-area 200-gallon, 11-inch deep fountain pond with biofilter. Questions on goldfish capacity, winter survival, freeze risk, winterizing, timing, and preparation.

Stocking & Depth Concerns

11 inches is shallow—predators access fish easily; winter freeze risk high. Start with ≤6 small goldfish. Upgrade pump to ≥400 gph for better filtration.

Winter Strategy

• Do not add fish now. Wait until spring (after early October cutoff).
• De-icer essential. Keeps gas-exchange hole open.
• Turn off fountain in winter; run pump at surface or use air stone.
• No "pond heater"—de-icers only prevent freezing, don't warm the pond.
• Feeding: Stop below 50°F; resume after 3 days at room temp if indoors.

See winterizing guide.