Upgrading Filtration for a Growing Goldfish Pond: Pump, Filter, and Waterfall Options

Current Setup

Submersible PondMaster pump/filter; pond enlarged, now 30+ goldfish. Filter media disintegrates, needs daily cleaning, floats, fountain falls over. Water is green.

Diagnosis

• Filter media is worn out—replace with new pads/floss.
• Pump may be undersized; aim for 700 gph for ~150‑gallon pond.
• Green water = need UV clarifier or more plants/filtration.

Upgrade Path

• Pump – 700 gph submersible (e.g., MagDrive 700).
• Filter – External pressurized filter (e.g., PondMaster 1000) or larger submersible.
• Waterfall – Plumb pump outlet to waterfall head; provides aeration and aesthetics.
• UV – Add inline UV clarifier if green water persists.

Shopping Resources

68+ filter options at That Pet Place.

Key Advice

Match pump flow to pond volume (turnover 1×/hour minimum). External filters offer easier maintenance and larger media capacity.