Pond Construction

Koi pond construction differs fundamentally from ornamental water features. Koi require deeper water, bottom drains, robust plumbing sized for high-volume filtration, and electrical capacity for pumps and aeration that run 24/7 year-round. Every construction decision affects long-term water quality and fish health.

The sequence matters: excavation and grading come first, then bottom drain and plumbing placement, followed by liner installation, then plumbing connections, and finally electrical. Retrofitting a bottom drain or re-plumbing an undersized system after the pond is filled and stocked is expensive and disruptive — get it right the first time.

Guides in This Section

Excavation & Grading

Proper slope, shelf depth, bottom contour for drainage, and soil considerations for koi pond excavation.

Liner Selection

EPDM vs RPE vs concrete — material comparison, thickness requirements, UV resistance, and expected lifespan.

Plumbing Layout

Pipe sizing, flow calculations, gravity-fed vs pump-fed design, unions, valves, and avoiding common plumbing mistakes.

Bottom Drains & Skimmers

Why bottom drains are non-negotiable for koi ponds, drain placement, skimmer types, and retrofit options.

Waterfall & Stream Design

Combining aesthetics with function — using waterfalls and streams for aeration and gas exchange while creating natural beauty.

Electrical Requirements

GFCI protection, dedicated circuits, pump wattage calculations, lighting, and code compliance for outdoor water features.

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