Clorox Spa® Antifoam prevents and eliminates foam in spas and hot tubs. A foamy spa is one of the most common issues that spa owners experience. A little foam is okay, but too much gets irritating and causes concern. Use the Clorox Spa® Test Strips to test your spa once or twice a week. Factors such as pH can change quickly, so test regularly. Maintain a pH balance of 7.2-7.6 and 3-6 ppm of bromine. Drain, clean, and refill your spa every 90 days. 


Surface Protection

Prevents equipment corrosion, and surface stains and scale.


Long-Lasting Sunlight Protection

Enriched with a chlorine stabilizer to extend the life of your clean.

Algaecide for Swimming Pools

Stops Algae

Kills and prevents green, mustard and black pool algae

Product reviews

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Nothing else works as well

Ignore the reviews saying it doesn’t work, because it very much does, and it does so literally within seconds. Ive tried other products when the local store was sold out for a brief period, which proved to me that nothing works better than this.
Ease of Use: Effectiveness:
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Spa Anitfoam

There are good reviews and bad, but I’ve only had great results using Spa Anti-foam from Clorox. My local Loews stock most of Spa products and that’s what we us in the hot tub. As I quote “Hot Tub Fun” 1 Cap full does our 400 gallon tub. Poof no foam and 1 great product
Ease of Use: Effectiveness:
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Doesn’t work

I purchased this at Lowes for my spa. It had a bit of dust on it so it might be a bit old. But it doesn’t work at all. I have used Clorox Spa Shocker and it seemed to work after I had to put in more than directed. I don’t think I will be buying anymore Clorox Spa products.
Ease of Use: 5 Effectiveness: 1
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Definitely recommended

Anti foam is great! This is our second spa (had to leave our other spa behind when our House was sold) but would not be without this product or any of the Clorox chemicals.
Ease of Use: 5 Effectiveness: 5
Haines City, Florida
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Instant Results

Occasionally our hot tub water developed foam. When Clorox Spa Antifoam is added, which is always just one teaspoonful (one cap full), all foam present on the water’s surface instantly disappears.
Ease of Use: 5 Effectiveness: 5
Hot Tub Fun
Pounding Mill, Virginia