Get rid of Cyanobacteria for good

Tank Health

Cyanobacteria thrive in high-nutrient conditions, such as excess food, decaying matter, and poor water quality. Overfeeding and overstocking can lead to an accumulation of waste and nutrients, causing an outbreak of cyanobacteria.

Effective Ways to Eliminate Cyanobacteria

Reduce Nutrient Levels – The first step to eliminating cyanobacteria is to reduce nutrient levels in your aquarium.

  1. Conduct regular water changes. One of the most effective ways of curing cyano, and most water issues, are water changes. A consistent, regular water change schedule will handle most cyano problems.
  2. Adjust feeding schedules. Too much feeding leads to excessive nutrients which then leads to cyano, algae and other tank issues. Feed only as much as you need, and you probably need much less than you are currently doing.
  3. Ensure proper filtration to remove excess waste and debris. Keep your filter socks clean, regular changes helps remove contaminants before they can decompose into your tank. A well tuned protein skimmer can remove tons of organics from the tank as well.

Increase Water Flow – Cyanobacteria thrive in stagnant water. Increasing the water flow in your aquarium can help to prevent the formation of cyanobacteria by creating an environment that is less conducive to its growth. Try adding or readjusting your power heads and return pumps to eliminate dead spots.

Use Chemical Treatments – There are various chemical treatments available that can help to eliminate cyanobacteria. However, it is essential to choose a product that is safe for your fish and other inhabitants. It is also essential to follow the instructions carefully and use the recommended dosage. We use Chemclean with pretty high success rates.

Introduce Beneficial Bacteria – Beneficial bacteria can help to compete with cyanobacteria for nutrients, reducing its ability to thrive. Adding beneficial bacteria supplements to your aquarium can help to restore the balance in your tank and prevent future outbreaks. We like Dr. Tim’s products.

Scrub and Clean – Regular cleaning and maintenance of your tank can also help to eliminate cyanobacteria. Use a scraper or a brush to remove the mat-like substance from the substrate and rocks. Be sure to clean your equipment regularly and remove any decaying matter from your aquarium.

Preventing Future Outbreaks

Preventing future outbreaks of cyanobacteria requires proper care and maintenance of your aquarium. It is essential to maintain proper nutrient levels, conduct regular water changes, and provide proper filtration to prevent the accumulation of waste and debris. Regular testing can help you avoid having outbreaks before they happen.


Eliminating cyanobacteria from your reef tank can be a challenging task, but it is not impossible. By following the above steps, you can effectively remove cyanobacteria from your aquarium and prevent future outbreaks. Remember to monitor your aquarium regularly and take action at the first sign of an outbreak to prevent it from spreading and causing harm to your aquatic ecosystem.

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