Is Duckweed Good For Betta Fish? (Answered)

Lauren Kiekbusch

Every betta fishkeeper knows how important it is to create a healthy and comfortable environment for their beloved Betta fish. As such, in-tank decor like rocks, live or artificial plants, driftwood, and tank hygiene are essential.

One very prominent addition to many fish tanks is duckweed. This aquatic plant has sparked curiosity in many aquarists and has been widely used by many. Due to its numerous benefits, it is no surprise that one would wonder if it is also good for betta fish.

Duckweed is good for betta fish as it can make a tasty snack, naturally release oxygen, improve water quality, and provide a good hiding spot, as bettas love to disappear out of sight.

Duckweeds are very beneficial aquatic plants, and betta fish are not restricted from enjoying their benefits. Although it is very profitable to plant duckweed in your fish tank, some setbacks do exist, and it is best to familiarize yourself with them properly.

The simple dynamic of caring for betta fish is understanding their basic needs, such as the best water temperature, diet, and tank mates, and setting up the tank to suit your exotic fish.

In this article, we will explore all the details about duckweed and include the benefits and risk factors of duckweed to betta fish. Let’s get right into it!

a siamese fighting fish in a fish bowl
Photo by Alina Vilchenko on

Can Betta Fish Eat Duckweed?

Yes, betta fish can eat duckweed. In fact, betta fish will be elated when this plant is introduced to the tank as they love and enjoy it as a snacky treat. Other than being a nice snack, duckweed contains nutrients that can be beneficial to bettas’ health.

This small floating plant can make a good, natural, and easily accessible source of nutrition, as it provides vitamins and essential minerals. Betta fish are mesmerizing and unique species requiring constant care and attention.

Notwithstanding, many enthusiasts can’t help but be captivated by their vibrant colors and eccentric fins. If you want to give your pet all the best, add duckweed to their feeding routine.

Benefits Of Duckweed To Betta Fish

Duckweed offers a variety of benefits to betta fish when it is incorporated or introduced to the tank, the following are the pros of duckweeds;

1. Water Quality Improvement

Introducing duckweed in your fish tank can improve the tank’s water quality. It absorbs the excess nutrients such as ammonia, nitrates, and phosphate in the water. By doing so, the risk of pollution and bacterial and algae growth are reduced minimally.

2. Natural Food Sources

Betta fish can eat duckweed. Therefore, it can act as a natural food source for your water pet when they randomly feel like munching on food, but it is lunchtime.

With duckweed in the tank, fishkeepers do not necessarily have to worry so much about their betta fish feeling hungry or starved, and it also helps reduce the cost of the purchase of fish feed.

3. Oxygenation

Like every other plant, duckweed undergoes photosynthesis and releases oxygen into the water. This goes a long way to improve the oxygen levels in the tank and benefits your betta fish and other aquatic pets in the tank.

4. Perfect Hiding Spot

Of course, by now, you should know how much betta fishes love to disappear in the tank as that is their natural instinct. Duckweed can be a natural hiding place for your betta fish because it creates a dense, floating layer on the water’s surface.

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What Are The Setbacks Of Duckweed?

There is no doubt that duckweed is good for betta fish, but there are some issues you might face when you add it to your tank. One of these issues is that duckweed tends to grow fast and eventually takes up a lot of space in the aquarium if care is not taken.

When this happens, the overgrown duckweed can overcrowd the tank, cover the tank surface, and prevent light from coming. In opposition to the benefits, duckweed has the potential to suffocate your fish if not controlled.

Also, it is worth noting that, not all bettas would be interested in eating duckweed, if your intentions are to provide them with an extra food source, it may not turn out the way you expected it to.


Duckweeds can make very excellent additions to your fish tank, and betta fish would appreciate it. This aquatic plant not only serves as a source of nutrition, it can also be a nice cover for betta fish as they love to hide out.

Duckweeds can also improve the quality of the water and promote oxygenation in the tank. However, it is in the best interest of you and your betta fish that you properly manage this plant to prevent it from overgrowing and potentially suffocating your betta.

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