Saltwater Pools Can Have Some Tell-Tale Issues

Saltwater Pools Can Have Some Tell-Tale Issues

Mystery Stains in Salt Generator Pools

From Aqua

One of the most popular trends in the swimming pool industry over the last two decades has been the proliferation of the saltwater swimming pool.  Never before in the history of the industry has a consumer-driven groundswell caused a demand for a product or service commensurate with salt water swimming pools, or chlorine generators.  Like many things in life that seem too good to be true, Salt water swimming pools can have some inherent issues that somewhat negate their promise of a maintenance free swimming experience.  This post from Aqua Magazine presents some frequently seen issues that happen with salt water chlorine generation, and explains what causes them.

Here is an excerpt from the post:

Salt chlorine pools have become quite popular for their convenience. There are no hazardous chemicals on site, water is sanitized and oxidized automatically. There are little to no chloramines. Many users of salt generators claim softer feeling water with less chemical odor and no dry or irritated skin.

Along with the report of these benefits, some have also reported some strange phenomena as well. These include things like discolored water, strange stains throughout the pool that are hard to remove and prevent. Stains appearing in salt pools include:

• Black flecks on pool bottom

• Black staining on ladders and light rings

• Reoccurring stains and discoloration on light rings around steps or rails and discolored water.

• Purple haze and debris in pool water

These stains seem to be a mystery, however in salt pools with high TDS they are due to a simple chemical reaction known as Galvanic Corrosion. To understand this electro chemical reaction a simple understanding of the technology of chlorine generators is first needed.

Chlorine generators work using a process known as electrolysis. In nature chlorine is found primarily in the chloride ion, which is a component of salt found in the earth or the oceans. Electrolysis is the means of generating chemical products from their native state. A salt generator works by passing electricity through a solution of sodium chloride to produce chlorine as a disinfectant or sanitizer.