Can Shrimp Consume Brown Algae? Answers Revealed!

If you’ve been struggling with an unwanted brown algae problem in your aquarium, you’ll be delighted to know that shrimp can actually help keep it in check. These little critters not only add charm and vibrancy to your tank, but they are also natural algae-eaters. With their voracious appetite, shrimp happily munch on brown algae, providing you with a natural and effective solution to maintain a clean and healthy aquatic environment.

Can Shrimp Consume Brown Algae? Answers Revealed!

Do Shrimp Eat Brown Algae?

Yes, shrimp are known to eat brown algae. Brown algae, also known as diatoms, are a common type of algae that can appear in aquariums. Shrimp, particularly certain species such as Amano shrimp and Ghost shrimp, are natural algae eaters and will consume brown algae as part of their diet. Their feeding activity can help control and reduce the growth of brown algae in the aquarium.

Understanding Brown Algae

Brown algae, scientifically known as diatoms, are single-celled organisms that can form a brownish or greenish film on aquarium surfaces, including glass, decorations, and plants. Although it can be unsightly, brown algae are generally harmless and can even indicate a healthy ecosystem in your aquarium.

Causes of Brown Algae Growth

Several factors can contribute to the growth of brown algae in your tank, including:

  • High levels of silicates in the water
  • Excessive lighting or prolonged exposure to light
  • Nutrient imbalance, such as an abundance of phosphates or nitrates
  • Newly established tanks going through the natural cycle

Shrimp and Their Diet

Shrimp are renowned for their ability to scavenge and clean up leftover food and debris in aquariums. They are omnivorous creatures, meaning they can consume both plant and animal matter. While shrimp have a diverse diet, their preferences can vary depending on the species.

Natural Diet of Shrimp

In the wild, shrimp primarily feed on:

  • Detritus – decomposing organic matter
  • Algae – including green, brown, and even red algae
  • Biofilm – a thin layer consisting of microorganisms and organic matter
  • Small invertebrates – such as microcrustaceans and worms
  • Plant matter – fallen leaves or decaying plant material

Varied Diet of Aquarium Shrimp

When kept in an aquarium, shrimp can adapt to the available food sources. Their diet may include:

  • Commercially prepared shrimp food – pellets, flakes, or granules
  • Blanched vegetables – such as zucchini, spinach, or kale
  • Frozen or live foods – brine shrimp, daphnia, or bloodworms
  • Algae wafers or pellets – specifically formulated for shrimp
  • Biofilm and detritus found in the tank

Can Shrimp Consume Brown Algae?

Now, let’s address the main question: do shrimp eat brown algae? The answer is yes, some shrimp species do consume brown algae, but to what extent depends on various factors. While some shrimp might readily consume diatoms, others may show little interest. It’s important to note that not all shrimp species are effective at controlling brown algae growth.

Shrimp Species Known to Eat Brown Algae

While individual preferences may differ, the following shrimp species are known to consume brown algae:

Amano Shrimp (Caridina multidentata)

Amano Shrimp are highly effective at removing brown algae from aquarium surfaces. They are voracious eaters and will actively consume diatoms and other forms of algae. Adding a few Amano Shrimp to your tank can help keep brown algae growth in check.

Nerite Snails (Neritina spp.)

Although not shrimp, Nerite Snails are popular algae-eating invertebrates. They have an appetite for different types of algae, including brown algae. Introducing Nerite Snails to your tank can contribute to a cleaner and algae-free environment.

Controlling Brown Algae in Your Aquarium

While shrimp can help control brown algae, it’s important to address the underlying causes to prevent excessive growth. Consider the following tips to keep the algae population in balance:


Reduce lighting intensity and duration to discourage excessive algae growth. Aim for an appropriate period of light exposure for your tank and consider using a timer for consistency.

Water Parameters

Maintain balanced water parameters by regularly testing and adjusting them as needed. Monitor and control phosphate and nitrate levels, as they can contribute to algae growth. Additionally, consider using reverse osmosis (RO) water or other methods to minimize silicate levels.


Regularly clean your aquarium by removing dead plants, uneaten food, and excess debris. Vacuum the substrate during water changes to remove accumulated detritus.

Introduce Algae Eaters

Aside from shrimp, you can introduce algae-eating fish or invertebrates like Nerite Snails, Siamese Algae Eaters, or Plecos. These organisms can help keep the brown algae population in check.

In summary, while some shrimp species do eat brown algae, their appetite for diatoms can vary. Amano Shrimp and Nerite Snails are known for their ability to consume brown algae effectively. However, keeping a well-balanced aquarium with proper care and maintenance practices is crucial to preventing excessive algae growth. By controlling lighting, monitoring water parameters, and introducing appropriate algae-eating organisms, you can maintain a healthy and visually appealing environment for your shrimp and other tank inhabitants.

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What other types of food do shrimp eat?

Shrimp have a varied diet and can consume a range of foods. Apart from brown algae, they also eat other types of algae, such as green spot algae and thread algae. They are omnivorous and will readily consume leftover fish food, dead plant matter, and small invertebrates like microorganisms and tiny worms. Some shrimp species are also known to feed on biofilm and detritus present in the aquarium.

How often should I feed my shrimp?

The feeding frequency for shrimp can vary depending on the specific species and the size of your aquarium. In general, it is recommended to feed shrimp sparingly, around once or twice a day, with only small amounts of food. Overfeeding can lead to uneaten food decaying and polluting the water, which can be harmful to both shrimp and other tank inhabitants. It is important to observe the shrimp and adjust the feeding schedule accordingly based on their appetite and behavior.

Can shrimp survive solely on brown algae?

While shrimp can consume brown algae, it is not recommended to rely solely on it as their primary food source. Brown algae may not provide all the necessary nutrients and minerals required for the optimal health and growth of shrimp. It is essential to provide a balanced diet by supplementing their meals with other suitable foods like specialized shrimp pellets, blanched vegetables (such as zucchini or spinach), and occasionally live or frozen foods like brine shrimp or daphnia.

Will shrimp eat all the brown algae in my aquarium?

Shrimp can play a significant role in managing brown algae in your aquarium, but they might not eliminate it entirely. The extent to which shrimp will eat brown algae depends on various factors, including the species of shrimp, the available amount of algae, and other available food sources. It’s important to note that maintaining a healthy aquarium with proper lighting, water parameters, and regular maintenance practices will contribute to keeping the algae growth under control, and the shrimp will help in keeping it in check.

Final Thoughts

If you have brown algae issues in your aquarium, introducing shrimp can be an effective natural solution. So, if you’re wondering, do shrimp eat brown algae? the answer is a resounding yes. Adding shrimp to your tank can help maintain a healthy balance and keep brown algae at bay.

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