Three Types of Algae Found In Swimming Pools and How to Treat It
As an owner of a residential or commercial swimming pool dealing with algae especially when the water is warm is not uncommon. As summer drags on and the warm water remains in a swimming pool there are a variety of reasons why algae might grow in your swimming pool. Some of the most common reasons why are the following:
- Not enough chlorine or whatever sanitation you use
- High levels of phosphates
- Unbalanced water chemistry
- Not filtering your pool water long enough
- High Cyanuric Acid (CYA) levels
Types of Algae in Swimming Pools
Before you can start removing the algae it is going to be extremely important to determine what type of algae you are dealing with. In swimming pool water, you will either find green, black, or mustard algae. Green is the most common and black is the most challenging to remove.
- Green Algae – This is the most common algae found in pool water, green algae will typically show up on the walls of your pool or along the surface of the water in large, floating clumps
- Black Algae – This is the most difficult type of algae to remove. Black algae like to form on the interior finish of your pool and deeply root itself in the cracks and crevices. If you have a Pebble Tec swimming pool, black algae love those even more.
- Mustard Algae – mustard algae is a form of green algae that is highly resistant to chlorine and has a brownish-yellow color. This type of algae is slick and slimy, which can help you distinguish it from dirt, which will have more of a coarse feeling. This form of algae collects on pool stairs, ladders, and near lights.
How To Remove Algae
If you have identified that algae are in your swimming pool you will need to make sure you balance your water chemistry. This means making sure your pH is between 7.2 and 7.6, that you raise your chlorine levels, and you keep it clean. If you don’t already have one you will need to purchase steel algae brush to help break up the algae. Remember, black algae are extremely difficult, so you will need to typically brush 3-4 times a day or more. We recommend tripling up on your normal amount of shock levels and run your pump longer to help filter. In the end, when you finish brushing chances are you will need to brush more. In some cases, you will need to also check your phosphate levels because if they are high no matter how much chlorine you have in the pool algae will grow.
If you should have any questions about algae and how to remove it, we highly recommend calling us before you start buying all sorts of other chemicals that the industry recommends.