FROG® Serene® Floating System

Complete Hot Tub Sanitizing Floater creates Fresh Mineral Water

Average Rating: 4 44 Reviews

FROG Serene keeps your hot tub clean while eliminating the work and the guesswork. Instead of spooning in chlorine daily, you simply replace a pre-filled cartridge about once a month. FROG Serene works by killing bacteria in two ways with sanitizing minerals and a very low level of bromine. The resulting Fresh Mineral Water® has a completely different quality that provides the serene feeling you’re looking for.

Pool Foreground Hot Tub Foreground
50% Less

Lower your bromine use up to 50%* with FROG minerals

Bromine Disolves

Unlike chlorine, bromine slowly dissolves in hot water so it’s easier to regulate. Plus far less odors.

Self Regulates

Bromine is less impacted by pH swings ensuring sanitizing effectiveness

Soft Feeling

Soft feeling water that’s easier on skin, swimsuits and spa surfaces

Set and Forget

Just set it and forget it for weeks at a time

Money Back Guarantee

Money back guarantee

FROG Serene Family of Products

Video Introduction to FROG Serene Floating System


Additional Information

The FROG Serene Floating System Fresh Mineral Water hot tub system utilizes mineral and bromine cartridges designed to destroy bacteria, reduce bromine use by up to 50% and improve the overall quality of hot tub water. The minerals last up to four full months, while the bromine can be dialed in to meet your precise needs, usually about three weeks per cartridge. Just snap the two cartridges into the floating cap and relax!

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What size hot tub will FROG Serene work in?
Hot tubs 150 to 600 are perfect for FROG Serene.

How does FROG Serene compare to other bromine floaters or using chlorine?
If you are tired of smelly chlorine odors and having to spoon in chemicals every time you use your hot tub, SPA FROG is for you. FROG Serene is not just bromine. It contains FROG minerals that destroy bacteria so you need up to 50% less bromine. The result is soft water without bleached suits or smelly odors.

How long do the mineral and bromine cartridges last?
The mineral cartridge lasts four months or whenever the hot tub is drained and refilled. The bromine cartridge lasts 2-4 weeks.

Can I remove SPA FROG from the spa when in use?
Yes. Simply turn it upside down on any surface so the water fills the green holder and doesn’t make a mess. Just remember to replace it when you exit the tub.

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* Compared to the minimum ANSI recommended bromine or chlorine level of 2.0 ppm for a hot tub

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See Our Customer Reviews

  1. DES57

    Rating: 5

    I’ve used the Frog Ease System for two years and switched to the Frog Serene this month after refilling. Same minerals and bromine, just a different float device. Loving it!

  2. Ashley H.

    Rating: 5

    We use the Frog Mineral Kit, and I like how easy it is and how clean it keeps our water

  3. John I.

    It’s the easiest hot tub chemicals to use. Plus, keeps the tub spotless.

  4. Peggy S.

    Rating: 5

    We use the Frog Bromine and Mineral kit in our hot tub. So easy and minimal maintenance. I wouldn’t use anything else after finding these products!

  5. Carissa P.

    Rating: 5

    Just started using the Frog Spa System…and it is SO easy! For the last 6 months I’ve been adding this n’ that…testing, testing, testing, adding and testing. With this system, I filled, balanced, and done!!! Just earned a long term user right here! ?

  6. Rachel N.

    Rating: 5

    I love it because I rarely have to add chemicals and it keeps the water sparkling clean!

  7. Bridget Y.

    Rating: 5

    Makes it low maintenance!

  8. Anthony Milliner

    Rating: 5

    I’ve owned a spa for twenty years. Adding the frog mineral system is a dramatic change from just plain spa water to soft water. I used to have to run to the shower after sitting in my spa to get the bromine dried out feeling off of me. Now when I get out I feel refreshed and just like I had put lotion on myself. What a amazing product. Also I want to mention the great customer service through the ask a question email. They respond very quickly and are more then happy to help. I am a customer for life. I enjoy my spa much more now I can’t wait to lounge in it as soon I get home.

  9. Scott McCabe

    Rating: 5

    I love the ease of the frog floater

  10. Keri

    Rating: 5

    Great product! I drained and filled my hot tub last weekend, added the start shock, added the spa frog. Super easy! I had to adjust pH slightly, but after that the balance is perfect! The water is clean, clear and soft as advertised. Super happy to find a low bromine, mineral spa solution to keeping my hot tub fresh, clean and ready for daily use! Highly recommended.

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