Building a Pond: Complete Beginner's Guide

Building a pond is an investment that provides years of enjoyment - provided you get the basics right. This guide takes you through the most important choices: location, size, filtration, and the first inhabitants.

Choosing the right location

Preferably choose a spot with partial shade. A pond in full sun heats up quickly and is more susceptible to algae growth, while too much shade can hinder plant growth. Avoid placing it directly under trees: falling leaves in autumn significantly disturb water quality.

Size and depth

The larger and deeper the pond, the more stable the water values and temperature - and the less maintenance you'll have in the long run. Rules of thumb:

• For a fish pond, plan for a minimum depth of 60 cm so the water doesn't freeze completely in winter.
• Want to keep koi? Then a significantly larger and deeper pond is needed - koi grow quickly and require a lot of swimming space.
• A shallower zone (20-30 cm) is ideal for marsh plants and provides fish with a warmer spot in spring.

Filtration and aeration

A good filter is essential as soon as fish are introduced to the pond. A pond filter purifies the water mechanically and biologically, similar to an aquarium filter but on a larger scale. For a well-stocked or larger pond, additional aeration with an air pump like the SuperFish Koi-Flow Air Kit is a valuable addition - especially in summer, when warm water holds less oxygen.

Maintaining water parameters

Just like with an aquarium, stable water quality is the foundation of a healthy pond. Regularly test for GH, KH, pH, ammonia, nitrite, and nitrate, and maintain the GH value with a product like GH-plus. You can read more about this in our article Preparing your pond for autumn.

The first fish

Allow the pond to cycle for several weeks before adding fish, so that a stable bacterial culture can develop - just like with an aquarium. Popular starter fish include:

• Goldfish - the classic, robust pond fish, suitable for year-round outdoor living
• Koi - more colorful and impressive, but with higher demands on pond size and water quality

Considering a sturgeon? Then first read our guide Keeping sturgeons - these fish have specific requirements for pond size and water flow.

Protection against predators

Herons and other birds quickly see a pond as a buffet. Shelter in the form of overhanging plants, a net, or sufficiently deep zones to hide in, will keep your fish stock safer.

Questions about your pond project?

Feel free to visit our store in Heinkenszand for personal advice on setting up your pond, or ask your question via chat.