What Causes Hot Tub Foam & How Do I Get Rid Of It?

At some point, every hot tub owner has dealt with hot tub foam. It is irritating, and is often difficult to get rid of. Here are some of the major causes of hot tub foam and a few tips on how to get rid of it. Often the solution is in knowing what causes it in the first place, and making an effort to avoid it from happening.

The Primary Causes Of Hot Tub Foam

Chemical Imbalance:

One of the primary causes of hot tub foam is a chemical imbalance in the water. When the water's pH, alkalinity, or sanitizer levels are not properly maintained, it can lead to the formation of foam. High levels of dissolved solids and contaminants, such as body oils, lotions, and cosmetics, can also contribute to this issue. Regular testing and balancing of the water chemistry are essential to prevent foam formation and ensure a safe and pleasant hot tub experience.

Organic Contaminants:

Organic contaminants like sweat, body oils, and cosmetics introduced by bathers can cause hot tub foam. These substances can accumulate in the water over time, particularly if the hot tub is heavily used. Regular cleaning and rinsing off before entering the hot tub can help reduce the introduction of these contaminants. Additionally, using a quality enzyme product can help break down organic matter and minimize foam.

Soap and Detergent Residues:

Soap and detergent residues from swimwear and skin can create foam in a hot tub. Even small amounts of soap left on swimwear after washing can cause significant foaming when agitated by the hot tub jets. To prevent this, rinse swimwear thoroughly before use and encourage bathers to shower before entering the hot tub. This helps remove any residual soap or detergent that could contribute to foam formation.

Airborne Contaminants:

Airborne contaminants such as dust, pollen, and other particles can settle on the water's surface and contribute to foam. This is particularly common in outdoor hot tubs or those located near busy areas. Using a hot tub cover when the tub is not in use can help minimize the introduction of these contaminants. Regularly skimming the surface and cleaning the hot tub cover can also help keep the water clean and reduce foam.

 

How to Get Rid Of Hot Tub Foam

Defoamers and Maintenance:

If foam has already formed in your hot tub, using a defoamer product can provide a quick fix. Defoamers break down the foam and allow it to dissipate. However, this is a temporary solution. To address the root cause, it's essential to regularly clean the hot tub, maintain proper water chemistry, and reduce the introduction of contaminants. Regularly draining and refilling the hot tub, along with cleaning the filters, will help keep the water fresh and minimize foam formation over time.