Problems due to Contamination in the pool water

Most people assess the well-being of a swimming pool by what they can see: the clarity of the water and the appearance of its surfaces. There are many common issues that lead to staining in pools, and a few not-so-well-known causes.

Water balance

Most stains and discoloration can be traced to improperly balanced water. But even “perfectly balanced” pools have the potential to contribute to these types of problems due to the almost-daily influx of metals, minerals and other contaminants.

Staining and discoloration can be broken down into two main categories: organic and inorganic.

  • Common organic causes include scale, algae, “pink slime,” white water mold and vinyl liner mold.
  • Inorganic causes include scum-line buildup, cloudy or tinted water and iron and copper stains.

Lesser-known causes of staining

Copper combined with high level of stabilizer,” creates a purple precipitant. This purple stain is bright and highly visible, often showing up on tile, spillways and pool cleaners.

Another potential stain-causer is potassium permanganate which creates a pink/purple stain when it comes in contact with the pool finish.

Iron and scale are two common causes of staining in a pool, known as iron scale this is a tough stain that can be particularly difficult to remove, as standard treatment doesn’t often work.