HTH spa™ Defoamer

Hot Tub Defoamer for Foam and Bubbles

  • A bottle of HTH spa Care Defoamer with a blue and white label, designed to remove foam from spas and hot tubs.

HTH spa™ Defoamer

Hot Tub Defoamer for Foam and Bubbles

HTH spa™ Defoamer helps you relax into clear, calm water by quickly eliminating unwanted foam from your hot tub or spa.

  • This powerful hot tub defoamer clears surface foam fast!
  • Compatible with all sanitizing systems including bromine, chlorine, and biguanide
  • HTH spa™ Defoamer restores tranquility and balance to your water in seconds.

Easy to use and fast-acting, it’s the simple way to keep your spa beautifully clear and inviting. HTH™ is here to help. 

Product Benefits

Softens Water with Vitamin E

HTH spa™ Defoamer is formulated to provide a more soothing experience.

Compatible with all spas

HTH spa™ Defoamer is great for all spas, including bromine, chlorine and biguanide.

You’re all clear with HTH™

For best results, use HTH spa™ Defoamer as part of your regular HTH spa™ care routine.

How to Use

How to Use

This product is designed to quickly eliminate foaming in spa and hot tub water caused by body oils, lotions, detergents, and other contaminants. The fast‑acting formula works with both chlorine and bromine sanitizing systems.

Application Instructions

Shake well before use.

With the circulation system running, add the product directly to the spa water.

Add 0.5 ounce of product per 200 gallons of spa or hot tub water.

Repeat as needed to prevent foam buildup.

Helpful Tips

Foaming is commonly caused by cosmetics, body oils, detergents, and improper water balance.

Using a defoamer as needed can help keep spa water clear and comfortable between drains and refills.

Ingredients

Ingredients

Contains proprietary defoaming agents.

Safety, Storage, and Disposal

Safety, Storage & Label Guidance

Use this product only as directed. Avoid contact with eyes and prolonged contact with skin.

Rinse hands after handling.

Do not store near chlorine, bromine, or other oxidizers.

Store in the original, tightly closed container at room temperature.

For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.

Frequently Asked Questions

  • What causes hot tub foam and how do I get rid of it fast?

    Hot tub foam is caused by organic contaminants — body oils, lotions, cosmetics, detergent residue from swimwear, and sometimes low calcium hardness — that lower the surface tension of the water. Add HTH spa Defoamer to eliminate foam immediately. For long-term prevention: shower before soaking, wash swimwear without detergent, add weekly enzyme cleaner, and replace water every 3–4 months.

  • How do I use HTH spa Defoamer?

    Add a small dose directly to the foamy water with the jets running. HTH spa Defoamer acts quickly — foam should dissipate within minutes. Do not overdose; a little goes a long way. Defoamer treats the symptom immediately, but identifying and removing the source of foam (oils, detergents, low calcium) is the lasting fix.

  • Is hot tub foam harmful or just cosmetic?

    Foam itself is cosmetically unappealing and can interfere with sanitizer distribution, but the underlying cause—organic contamination—is the real concern. Heavy foam can indicate a buildup of oils, lotions, and other contaminants that can use up sanitizer more quickly, making it harder to keep the water clean. Treat foam with defoamer, but also test sanitizer levels and shock the tub to address the organic buildup.

  • Will defoamer affect my hot tub water chemistry?

    HTH spa Defoamer does not significantly affect pH, alkalinity, or sanitizer levels when used at the recommended dose. It is a surface-active treatment, not a chemical balancer. Always retest chemistry after any treatment to confirm levels are within range.

  • My hot tub keeps foaming after I add defoamer — what is wrong?

    If foam keeps returning after defoamer treatment, you have an ongoing source of the problem: high levels of accumulated oils and organics in the water. Shock the tub with non-chlorine shock, clean the filter, and consider a partial water drain and refill. If foam persists despite all of these steps, it is time for a full drain, shell clean, plumbing flush, and fresh fill.

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Quick Spa Tips

  • Always read product label directions and use only as directed

  • Always add chemicals to spa water, never the other way around

  • Never add chemicals to spa water when people are in the spa

  • Warning symbol with a triangle and exclamation mark on a blue background

    Never mix products together

  • Always store spa products in a cool, dry location and away from direct sunlight

  • Outline of a pair of gloves on a navy blue background

    Always wear proper safety equipment when handling chemicals