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How Many Fish Should I Put In My Pond? | Decorative Ponds & Water Gardens Q & A

How many fish should I put in my pond?

Q: How many fish should I put in my pond?

Grady – Nevis, MN

A: The general rule for stocking your pond is 1” of fish for every one square foot of surface area, but of course there are exceptions to every rule. First and foremost, don’t forget to leave room for your pond fish to grow. Stocking your pond with 10 one-inch fish may be fine for now, but what about next year when your pond fish have doubled or tripled in size?

Additionally, larger pond fish produce exponentially more waste than smaller fish so you need to factor this into your plans. Look at the chart below for an example of what I mean. One 6” fish produces 3.3 times more waste than one 4” fish and 26 times more waste than one 2” fish. In general, it’s probably best not to stock your pond to the max right away. As your pond is more established and you add better aeration and filtration, your pond will be able to handle more fish.

There are a variety of koi fish packages to choose from when you are ready to get started.

Fish Length Fish Waste (Grams/24 Hours)
1″ .10
2″ .75
3″ 2.43
4″ 5.80
5″ 11.32
6″ 19.55

Pond Talk: Do you find that your fish are cozy or crowded?

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What Is The Difference Between A Retention Pond And Detention Pond? | Ponds & Lakes Q&A

Q: What is the difference between a retention pond and detention pond?

Peter – Harrison, AR

A: A retention pond holds a specific amount of water indefinitely. The pond is designed to have drainage leading to another location to keep the pond from overflowing during heavy rains, but otherwise the pond is intended to always be full. You’ll frequently see these types of ponds in commercial properties or subdivisions, often with decorative fountains in the center.

A detention pond, or “dry pond,” is a low-lying area that temporarily holds water until the water drains to another location. It is not filled with water all the time. A detention pond is generally used for flood control when large amounts of rain and storm water runoff could cause flash flooding if not dealt with properly.

Poor maintenance of either type of pond can create unpleasant odors, nuisance insects, algae blooms, and an unkempt area. Due to the nature of runoff having exceptional amounts of nutrients, using natural products such as Pond Logic® Eco Boost™ or Pond Logic® Muck Away™ can help control these flash floods of nutrients.

Pond Talk: Do you live near a retention or detention pond? How is it cared for?

Pond Logic EcoBoost - Enhance Natural Bacteria

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