#2 How to Decide What Size Pond to Build: Pond Construction

How to Decide the Size of Your Pond

When planning your backyard oasis, one of the most important decisions you’ll make is determining the size of your pond. Factors to consider when choosing how large your pond should be include the available space in your yard, future maintenance preferences and budget.

Why a Larger Pond is Easier to Maintain

Did you know that a larger pond, when properly constructed with all the necessary components for a healthy ecosystem, is often easier to maintain than a smaller pond? It’s true! Just like with aquariums, a larger body of water tends to be more stable and less prone to sudden changes in water quality. A larger pond offers more space for aquatic plants, which are essential for natural filtration and maintaining clear, healthy water.

What is considered a Large or Small pond? 

Understanding Pond Sizes

What exactly is considered a large or small pond? A small pond is typically about 10 x 10 feet or smaller, while a medium-sized pond might be around 10 x 15 feet. Large ponds can start at 25 x 25 feet and go up from there, depending on your space and preferences.

A pond that is deep enough for koi to overwinter here in Colorado will be about 36″ deep.  Goldfish can get through the winter in 20″!

What makes an ecosystem?

Any body of water will become an ecosystem.  Whether it’s an enjoyable and nice looking ecosystem or not, is definitely debatable! Think about a small amount of water that gets stuck in a barrel,   an old pot,  or wheel barrow. It develops little tiny critters (think mosquito larvae) growing in it along with algae or other plant growth. 

Creating a Balanced Pond Ecosystem

In contrast, a well-designed backyard pond will develop a balanced ecosystem that supports clear water and healthy plant and fish life – just what we want to see! 

Have you ever noticed your local pond that people may swim in, paddle board and enjoy other activities in? It usually has muck, pea soup looking water, large amounts of cattails and breeds mosquitos.  It is an ecosystem.  In a large local pond that may be several acres large, that type of ecosystem is acceptable, but when we are talking about backyard ponds (or front) people want more clear and clean water. 

Larger ponds provide more space for beneficial aquatic plants, which help filter the water naturally and provide habitat for fish and other wildlife. This natural balance makes it easier to maintain clear, clean water without the need for constant intervention. When we work with Mother Nature to support a clear water pond ecosystem, we can have our own sanctuary steps out the backdoor! 

Photo of garden pond

What size pond is best for you?

Choosing the right pond size depends on your specific needs and the space available in your yard. If you plan to keep fish, the pond should be at least 8 x 11 feet to accommodate a depth of 36 inches, which is ideal for fish to thrive. However, not everyone has the space or budget for a larger pond, and smaller ponds can also be beautiful and enjoyable with the right design and maintenance.

When planning your pond, don’t forget to account for space for essential components like a skimmer, pump, and a stream with a bio fall. These elements maintain the pond’s ecosystem and keep the water clean and clear.

It helps to understand How a Pond System Works to really grasp why it needs to be at least a certain size. You can read more about that HERE.  

Many homeowners who build a pond for the first time often opt for a smaller size to save space or reduce costs. However, after enjoying their pond for a while, they frequently wish they had gone larger! A bigger pond not only offers a more stable ecosystem but also provides more room for plants, fish, and decorative features.

When planning your backyard pond, consider how you want to use it and the level of maintenance you’re willing to commit to. A larger pond will be a larger initial investment, but it can offer greater rewards in terms of enjoyment and ease of care.

Kristi's Tips

  Did you know a healthy pond will have 40 to 60% of the surface area coverage of plants?  Yes!  You will need to plan parts in the pond that are the right depth for plants. 

  Read about the plants before you put them in.  Many aquatic plants are invasive and can be a nightmare later to control.