Swimming Pool Stains & Discoloration
One of my favorite swimming pool product lines is produced by Jack’s Magic. They are industry experts on everything you would ever want to know about pool stains and pool water chemistry.
With their help, I’m creating a series of articles that will educate you on swimming pool stains, so that you can keep your pool looking beautiful all year long!
Most people assess the “well being” of their pool in three simple ways:
- Is the water sparkling clear?
- Is the pool free from algae?
- Is the pool free from stains?
In this month’s featured article, Familiarization with Stains and Discoloration, we will focus on number three — staying stain free!
Featured Article: Familiarization with Stains and Discoloration
The goal of these articles is to make you aware of and familiar with the major stains and discoloration most commonly found in swimming pools — and to provide you with an understanding of how properly balanced water plays a role in stain development. Pools do stain, even with balanced water.
When you finish reading this set of articles, you will be able to…
- Identify the most common pool stains and discoloration.
- Efficiently carry out the Stain ID process to determine the proper treatment.
- Intelligently and accurately locate the factors that may have contributed to the discoloration.
A properly maintained pool is an ongoing source of satisfaction and enjoyment. As a pool owner, you depend on professional advice to keep your pool operating correctly and looking its best.
Stains and discoloration come from a variety of sources and are in many forms; most of which, you have no control over. Everything Jack’s Magic does, should be based on properly balanced water. Properly balanced water is your best friend, whereas, unbalanced water can be a catalyst for staining, scaling and discoloration.
There are two types of pools:
Those that are stained…and those that are going to stain!
Types of Discoloration
- Organic Discoloration
- Inorganic Discoloration / Stains
Common Organic Discoloration:
- Discoloration: Scale
- Characteristics: Hard, crusty build-up on pool interior
- Possible Causes: High pH and/or alkalinity; excessively high calcium
- Discoloration: Green Algae
- Characteristics: Greenish tint to water and/or green deposits on pool surface
- Possible Causes: Rain, heat, low/no sanitizer level
- Discoloration: Mustard Algae
- Characteristics: Brownish-yellow, wispy — will brush off easily, but reappear; often found in shaded areas
- Possible Causes: Rain, heat, low/no sanitizer level, contaminated swim suits
- Discoloration: Black Algae
- Characteristics: Black spots or clusters; has “roots” which can penetrate finish
- Possible Causes: Continually low sanitizer levels
- Discoloration: Pink Slime (bacteria)
- Characteristics: Pinkish-red; usually more prevalent in biguanide pools
- Possible Causes: Rain, soil, contaminated swim suits; grows in circulation piping
- Discoloration: White Water Mold
- Characteristics: Resembles small, floating pieces of white tissue paper
- Possible Causes: Low/no sanitizer; grows in circulation piping
In our next article, we will go over inorganic discolorations and stains.
Thank you for reading!
Do you have questions about pool stains? Email me any time at Owner@LightningPoolSupply.com or leave a comment below!
Chip Payson – Owner of LightningPoolSupply.com
Entry filed under: Stains and Discoloration. Tags: algae, bacteria, black algae, chemistry, discoloration, green algae, jack's magic, mustard algae, organic stains, pink slime, pool, scale, stain, swimming pool, water balance, water mold, white water mold.