FROG® Serene® Floating System

Complete Hot Tub Sanitizing Floater creates Fresh Mineral Water

Average Rating: 4 45 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. Matthew Frank

    Rating: 5

    Love the ease of use of this product. Get the water balanced initially and mostly set it and forget it. Keeps the water smooth, clear and not harsh smelling. I only additionally need to shock it with some non-chlorine shock after use and good to go.

  2. Lisa Carmichael

    Rating: 3

    I’m a new spa owner. Love the product, but worried about the environmental impact of sending the inline cartridges to the landfill every month. Thinking about changing systems because of this. They should make the inline cartridges refillable, this would also be more cost effective for your customers. This should be easy for the company to do.

  3. Ryn

    Love the effects, hate the plastic!
    Please make your cartridges refillable.

  4. Dario M

    Rating: 5

    Easy, effective and fast! Really good product. Got to love it!

  5. Kelly W

    Love the frog system. Have been using it for 5 years in our hot tub.

  6. Brooke Peeler

    We use the FROG Bromine Cartridges and love them!! So easy and convenient!

  7. Alison Church

    Rating: 5

    We’ve been using the serene system in our hot tub for almost 2 years now. It is so easy to maintain, I love it!!

  8. Tracy Walka

    Rating: 5

    So happy I changed. Easy, easy, easy to maintain my hot tub now!

  9. Zach Thompson

    Rating: 2

    This is not working as advertised. I started with new water and had it balanced perfectly. Now with the floating system, it is impossible to get the bromine between 1.0 and 2.0. When I have it set at 5…it is 3.0+. When it is set at 4…it is less than 1.0. Very frustrating!

  10. Zach

    Rating: 2

    I bought the Frog Serene Floating System. I put new water in first, got it perfectly balanced. Now, I am not able to get the bromine from the floating system dialed in. I have a 500 gallon spa, so I started with it at setting 5. The bromine was way too high. So, I then went to setting 4. Then the bromine is too low. I am not able to get into the sweet spot. Very frustrating. It’s almost like I need a 4.5 setting… This is getting to be much more trouble than it’s worth…

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