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Why You Should Add Spirulina to Your Fish Tank Today!

Ok, now hold on. Before you go dumping 3 pounds (PLEASE DONT!) of random Spirulina you found on aliexpress into your tank, lets first get to know what it is, who benefits from it, and why we should be using it.



What is Spirulina?

Top View spilt Spirulina Powder against white background

Spirulina is a type of cyanobacteria, commonly known as blue-green algae. It has gained popularity due to its dense nutritional profile, which includes:

  • Proteins: Spirulina is an excellent source of complete protein, containing all essential amino acids.

  • Vitamins: Rich in vitamins A, B1, B2, B3, B6, B9, C, D, and E.

  • Minerals: High levels of iron, calcium, magnesium, and potassium.

  • Antioxidants: Contains powerful antioxidants such as phycocyanin, beta-carotene, and chlorophyll.


Benefits of Spirulina for Aquatic Invertebrates

Aquatic invertebrates, from tiny shrimps to larger crabs and snails, play a vital role in maintaining the balance (and beauty!) of aquatic ecosystems. Ensuring their health and vitality is crucial not only for their survival but also for the overall health of your aquarium. This blue-green algae is packed with essential nutrients that offer a myriad of benefits for aquatic invertebrates. Let's dive into the remarkable advantages of incorporating spirulina into their diet.


Enhanced Growth and Development

  • Complete Protein Source: Spirulina’s high protein content is crucial for the growth and development of aquatic invertebrates. The presence of all essential amino acids ensures that these creatures can build and repair tissues effectively.

  • Growth Stimulation: Regular intake of spirulina promotes healthy growth rates and helps in achieving optimal size and weight.

Improved Shell and Exoskeleton Health

  • Calcium and Magnesium: Spirulina is incredibly rich in calcium (more than 26x the amount in milk!) and magnesium, essential for the formation and maintenance of strong shells and exoskeletons. This is particularly beneficial for crustaceans like shrimps and crabs.

  • Shell Integrity: These minerals help prevent issues like shell deformities and promote overall structural integrity. Boosted Immune System

Blue Neocaridina shrimp on wood in planted tank with tetras in background.
  • Antioxidant Power: Spirulina is packed with antioxidants, which help protect aquatic invertebrates from oxidative stress and free radical damage.

  • Disease Resistance: Regular consumption of spirulina strengthens the immune system, making invertebrates more resistant to common diseases and infections. Enhanced Reproductive Health

  • Nutrient-Rich: The rich blend of vitamins and minerals in spirulina supports reproductive health, leading to higher fertility rates and healthier offspring.

  • Improved Breeding Success: Aquatic invertebrates fed with spirulina may show improved breeding success and increased survival rates of juveniles. Increased Vitality and Activity Levels

  • Energy Boost: The comprehensive nutrient profile of spirulina provides a steady energy supply, enhancing the activity levels and overall vitality of aquatic invertebrates.

  • Color Enhancement: The pigments in spirulina, such as beta-carotene, can enhance the natural coloration of invertebrates, making them more vibrant and visually appealing.


How to Incorporate Spirulina into Their Diet

Integrating spirulina into the diet of aquatic invertebrates is straightforward and can be done in several ways:


  1. Powdered Spirulina: Sprinkle powdered spirulina directly into the water or mix it with other foods. Aquatic invertebrates will consume it naturally as they graze. Use this method only if you have a large colony of shrimp, and dont mind the water looking green for a few hours.

  2. Spirulina Tablets or Pellets: Spirulina tablets can be too concentrated to add to aquariums, and can often cause havoc in water clarity. If you have fast eating fish (plecos) , this might be an option, but not one we personally use.

  3. Infused Calcium Tablets:Simply add a few tablets of KatsAquatics Calcium + Nutrition or the Limited Edition 3-in-1! The tablets contain spirulina and do not dissolve into water. They'll provide a continuous supply of spirulina-infused nutrients (and many more benefits!) particularly beneficial for shell health and exoskeleton health.

Potential Problems with Excessive Spirulina

While spirulina offers numerous health benefits for aquarium fish, it's important to be cautious about how you introduce it into your tank. Adding spirulina directly to the water in large amounts can lead to several issues that can negatively impact your aquarium's ecosystem and the health of your fish.

  1. Water Quality Issues

  • Algal Blooms: Spirulina, being a type of algae, can contribute to algal blooms if added in excess. This can lead to cloudy water and reduced water clarity, making it difficult to enjoy the aesthetic appeal of your aquarium.

  • Oxygen Depletion: Large amounts of pure spirulina in the water can increase the biological load in the tank, leading to higher levels of organic matter. As this matter decomposes, it consumes oxygen, potentially depleting the oxygen levels needed by your fish and other aquatic life.

  1. Imbalanced Nutrient Levels

  • Nutrient Overload: Excess spirulina can release high levels of nutrients into the water, such as nitrogen and phosphorus. This can disrupt the balance of your aquarium's ecosystem, encouraging the growth of unwanted algae and other organisms.

  • pH Fluctuations: The decomposition of excessive spirulina can alter the pH levels of the water, creating an unstable environment that can stress or harm your fish.

Thats why, instead of guessing, potentially putting your fish at risk, and wasting your hard earned $$, we recommend feeding foods that already contain high levels of spirulina - makes everyones life easier!


Close up showing KatsAquatics Calcium tablets

Benefits of Using KatsAquatics Calcium + Nutrition


By choosing KatsAquatics Calcium + Nutrition, you ensure that your snails receive:


  • Carefree and Easy Spirulina Delivery: Green Calcium + Nutrition tablets are packed with Spirulina, spinach, protein and calcium. All it takes it dropping in one tablet every few days and you can rest assured that your inverts are well fed with everything their bodies need.


  • Optimal Shell Strength: Enhanced calcium and protein support strong shell development.

  • Shell and Exoskeleton Health: For invertebrates like shrimps, crabs, and snails, calcium is vital for building and maintaining strong shells and exoskeletons. This reduces the risk of deformities and ensures proper molting.

  • Improved Immunity and Vitality: The comprehensive nutrient profile boosts immunity and increases energy levels.

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