How To Get Rid Of Swimming Pool Black Algae

How To Get Rid Of Swimming Pool Black Algae

If you own a swimming pool, you’re certainly well aware of the numerous difficulties involved in keeping it clear and clean. Black algae are among the most difficult and ugly of these problems. If left untreated, black algae, a type of bacterium, can swiftly spread and colonize sizable portions of your pool.

It can develop in the crevices and crevices of your pool. But don’t worry, you can get rid of black algae and prevent it from returning with the appropriate information and equipment. Everything you need to know about black algae, including what it is, how it forms, and how to prevent and get rid of it, will be covered in this article.

Understanding Black Algae

Black algae is a type of bacteria that grows as tiny, dark spots on your pool’s sides and floor. Although it’s not technically algae, it’s given the name black algae because of how similar it can appear to other kinds of algae. Because it develops a thick, protective layer that protects it from chlorine and other chemicals, black algae are extremely challenging to get rid of.

Your pool may develop black algae for a number of reasons. Black algae can develop due to poor water chemistry, inadequate cleanliness, poor circulation, and poor filtration. Furthermore, if there are a lot of trees or plants close to your pool, they may drop seeds, leaves, and other debris into the water, which could act as a feeding supply for black algae.

Prevention is Key

Preventing black algae from growing in the first place is the best strategy to handle it. This can be achieved by keeping the water chemistry balanced, keeping your pool clean, and checking the efficiency of your circulation and filtration equipment.

Testing the water in your pool on a regular basis to ensure that the pH, chlorine, and other essential elements are all within the proper range is one of the most crucial things you can do to prevent black algae. The ideal frequency for water testing is once per week, especially in the summer when you use your pool more regularly.

Another crucial aspect in preventing black algae is maintaining a regular cleaning regimen. This entails routinely vacuuming your pool, cleaning the walls and floor, and brushing out any dirt using the pool brush.

Manual Removal

The first step in the elimination of black algae is frequently hand removal. This may entail using a stiff-bristled brush to scour the afflicted areas, sucking up the dirt with a pool vacuum, or using a pool clarifier to help the water clear out.

Chemical Treatment

You might need to employ chemical treatments if manual removal fails or if the black algae are very difficult to get rid of. A shock treatment, which is adding a significant amount of chlorine or other chemicals to your pool to remove the black algae, is one of the most efficient chemical treatments.

A phosphate treatment is an additional choice that can assist your pool’s water to become less favorable to black algae by removing phosphates, which serve as the food source for algae. Another choice is algaecides, which are substances created especially to kill algae. The algae can also be simpler removed from the water by using a flocculant, which aids in clumping the algae together.

Maintenance After Removal

After getting rid of the black algae, you must take care of your pool to prevent its regrowth. This entails preserving the ideal water chemistry, maintaining the cleanliness of your pool, and checking the efficiency of your circulation and filtration equipment. Maintaining a clean pool requires routine cleaning and vacuuming.


As a result, For swimming pool owners, black algae can be an irritating and ugly issue, but it doesn’t have to be a never-ending battle. You may take measures to keep your pool clear and clean by learning what black algae is, why it grows, and how to avoid and remove it.

The goal is to stop black algae from growing in the first place. This can be achieved by keeping the water chemistry balanced, keeping your pool clean, and checking the efficiency of your circulation and filtration equipment. Don’t wait to take action if your pool does develop black algae. When applied appropriately and safely, manual removal and chemical treatment can aid in eliminating black algae and preventing its regrowth.

Although prevention is essential, if black algae do form, don’t become alarmed. You can maintain a clear, dazzling pool all season long with the right information, equipment, and regular maintenance.