FROG® Serene® Floating System

Complete Hot Tub Sanitizing Floater creates Fresh Mineral Water

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FROG Serene keeps your hot tub clean while eliminating the work and the guesswork. Instead of spooning in bromine 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!

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.

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

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Tracy Russell - July 1, 2022

As a new spa owner, one of my apprehensions was being able to keep my water clean and fresh. I received the Frog Serene Floating System with my purchase and I can not be any happier with the results. So easy to use for a first-timer and it does an excellent job keeping the spa clean.

AP - November 19, 2020

Big fan of the Serene system. 400-gallon Bullfrog tub has gone more than a month with the bromine set on 3. Easy combo with some bulk non-chlorine shock and tub crystal clear.

R. Castellanos - August 19, 2020

great product, use is easy and water feels, smells and looks great.

Matthew Frank - July 2, 2020

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.

Dario M - July 23, 2019

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

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