Copper Sulfate Crystals Use in Swimming Pools

Arguments in favor of copper sulfate crystals:

• They have special ability to control algae.
• Pools require lesser amounts of chlorine for sanitation.

Arguments against the crystals say that the chemical is simply too strong for personal pools; although it is effective in public water supplies.

What Is Copper Sulfate?

Before learning how to use copper sulfate crystals, it helps to understand what copper sulfate is. Without getting into an advanced chemistry lesson, copper sulfate is a chemical used for various purposes such as:

• Dietary supplement in animal feeds
• Fungicide
• Algae control

It’s this last use that swimming pool owners are most interested in.

Copper Sulfate Crystals Use in Swimming Pools: Algae Control

Why do pool owners use copper sulfate crystals? In short, the crystals easily dissolve in water and once applied to a water supply, help control the growth of algae; something no one wants in a swimming pool! If algae growth isn't contained, it can lead to:

• Unsightly appearance: While this is only a cosmetic concern, it is a big consideration. Nothing can spoil a pool party quicker than a pool with unsightly algae growth in it.

• Contamination: Heavy algae buildup can be toxic and therefore, dangerous to your health. Cosmetic concerns may be superficial, but when your health is involved, it’s much more serious.

Benefits of Copper Sulfate

When considering copper sulfate crystals use in swimming pools, studies show that copper sulfate is better not only for the pool, but also for the swimmers when compared to the effects of chlorine. Copper sulfate beats out chlorine in:

• Less eye stinging: While even moderate levels of chlorine can cause eye irritation in swimmers sensitive to this chemical, the use of copper sulfate doesn’t seem to cause the same irritation.

• Swimsuit longevity: Chlorinated water can be especially harsh on swim wear material, while copper sulfate tends to have a gentler effect on bathing suits. Considering that some swimsuits can cost quite a bit of money, making them last longer is a reasonable concern.

• Pool liners: Again, the harshness of chlorine can bleach your pool liner, whereas copper sulfate is a milder chemical option.

Cons of Copper Sulfate

One reason copper sulfate isn’t advised for home pool use is because it has the potential to stain the pool interior, which no pool owner wants. Also, the amount of knowledge needed to effectively apply the crystals to the water, without staining or clouding, may be too advanced for some pool owners.

Copper Sulfate Crystals Safety

As with any chemical, you should pay careful attention to the storage instructions to ensure that no accidents occur. Recommended storage for copper sulfate crystals includes keeping it in a cool, dry place and when it's not in use, in a tightly closed container. The chemical is also acidic and can greatly irritate the eyes and skin if it comes in direct contact with either; it’s good practice to wear safety goggles and gloves when handling.

A Controversial Chemical

While some pool chemical experts assert that copper sulfate crystals are fine for swimming pools, others caution against it, saying that while copper sulfate is an effective algaecide in water supplies such as ponds, lakes, water supply systems and reservoirs, it’s too harsh for safe use in personal pools.

If you choose to use copper sulfate crystals, it’s in your best interest to make sure you purchase a product registered under the Pest Control Products Act. Also, make sure you follow the label directions to the letter to avoid harmful effects to yourself and other swimmers. The best place to purchase copper sulfate crystals is from a swimming pool expert, not your local grocery store.

Still, it’s best to do your own research into the pros and cons of using copper sulfate crystals because only you know how much time and energy you’re willing to invest to ensure the absolute proper application of this chemical. After all, you're goal is for everyone to enjoy your pool and stay safe!