Pool Care: Types of Pool Algae and How to Treat Them

Algae are one-celled microscopic plants that can develop in pools through natural elements like wind and rain. If left unattended, algae will multiply and create visual pollution and other issues within pools. These colonies of algae can take the form of many different colors, depending on the type.

We'll discuss the various types of algae and the best ways of treating them to ensure a clean and attractive swimming pool.

Green algae

This is perhaps the most common algae found in residential swimming pools. Also known as Chlorophyta, green algae are a slimy substance often found floating on the water's surface. If left untreated, green algae can spread to the walls, floor, and stairs of a pool. In extreme cases, this algae can make it impossible to see the bottom of the pool at all. Green algae can appear without warning, typically during the summer months.

Brushing alone may remove the algae, but it isn't enough to eradicate it. The best treatment for green algae is to use a combination of algaecide, brushing, and shock treatment. Shock treatment usually refers to superchlorination, a process where you elevate the pool's chlorine levels for a short time.

Homeowners should ensure that the chlorine concentration is within the recommended range to avoid algae.

Yellow algae

Yellow algae (also known as mustard algae) is identified by its brownish or muddy yellow color and slimy texture. It is typically found in shaded parts of the pool but can also appear on the water's surface. Although it spreads slower than its green counterpart, it's far more difficult to destroy.

If homeowners see yellow algae forming in their pools, the best course of action is to perform superchlorination. Also, vacuuming the pool can help remove algae. For best results, it's worth contacting a professional service to complete this task.

Pink algae

Pink algae refer to a slimy substance, typically reddish-orange, and usually appears on the pool's waterline. It also grows around pool pipes. Out of all forms, pink algae are perhaps the easiest to eradicate. A simple brushing and sanitation job should do the trick. If the issue gets out of hand, you should consider shock treatment.

Blue-green or black algae

Blue-green and black algae are the same. Usually found in lakes and ponds, it's not uncommon to see this bacterium in an unmaintained pool. This algae type is the most difficult to remove once formed. It almost always forms upon the surface of a pool and multiplies at a rapid rate. When left unattended, black algae can penetrate plaster and concrete through an extensive root network, causing more damage to a pool.

If you see signs of black algae forming, use a stainless-steel brush to crack the shell and deploy sanitizers. If the blue-green or black algae has spread far, consider shock treatment and contacting a professional pool cleaning service.

Contact a professional for best results

Homeowners may struggle to determine the correct balance of chemicals needed for their specific pool. Typically, this all depends on pool size, the state of the water, and other factors. Experts can ensure a pool has the proper chemical balance to avoid algae appearing in the future. What's more, they can determine this far quicker than if individuals took a DIY approach.

Regular pool maintenance can significantly reduce the risk of algae forming. For best results, it's worth contacting a pool cleaning service to ensure the job is done efficiently.

Dog Days Pool Service is a pool service company serving Clearwater, Safety Harbor, and all surrounding areas. We offer pool cleaning, maintenance, troubleshooting and more and would love to hear from you! (727) 791-6012