• Includes Serene Floating System, 1 Mineral Cartridge, 1 Bromine Cartridge, 1 packet of Frog Jump Start Shock and 1 Pack of 30 Frog Test Strips
• Kills Bacteria in 2 ways with Minerals and Bromine
• Minerals reduce Bromine use up to 50%
• Pre-filled cartridges - no touching or measuring chemicals needed
• For use in any Hot Tub up to 600 gallons

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 double-teaming bacteria 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.

• Includes 1 Mineral Cartridge and 3 Bromine Cartridges
• For use with either Serene Floating System or Serene Inline Systems

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 double-teaming bacteria 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.

Complete Mineral & 200 gram Bromine Bundle for Hot Tubs with the FROG Inline Cartridge System (approximate 4 month supply) - Free Shipping!

The FROG Serene In-Line Cartridge Bundle – your secret to effortless spa maintenance and crystal-clear “mineral water”. This exclusive value pack includes 1 FROG Sanitizing Mineral Cartridge and 3 upgraded Bromine Cartridges (200 grams each compared to the yellow 150 gram Cartridges ), designed specifically for hot tubs with built-in cartridge holders.

Perfect Compatibility:

Specifically engineered for spas manufactured with the built in FROG Inline System including:

• Marquis Spas
• Artesian Spas
• Caldera Spas
• Hot Spring Spas

 Revolutionary Dual-Action Sanitizing:

FROG Serene combines the power of sanitizing minerals with a precise low-level bromine delivery system . This innovative dual-action approach attacks organic contaminants  while using up to 50% less bromine and maintaining pristine water quality with no smelly chlorine odors.

What's Inside:

• 1 FROG Sanitizing Mineral Cartridge (4-month lifespan)
• 3 FROG Serene 200 gram Bromine Cartridges (up to 4 weeks each)

The FROG Serene Advantage:

Unlike traditional sanitizers, this system delivers:

• Prefilled cartridges for no scooping and mess-free maintenance
• Gentler water that's softer on skin, hair, swimsuits, decking, and spa components
• Balanced pH levels and reduced pH swings ensuring sanitizing effectiveness
• Significantly reduced chemical odors (Ahhhhhh!)

Smart, Simple Maintenance:

Forget the daily ritual of scooping, measuring and adding chemicals. Simply replace the bromine cartridge monthly and the mineral cartridge every four months. The prefilled cartridges eliminate guesswork and ensure perfect water quality without the hassle of measuring or handling harsh chemicals directly.

Premium Water Quality:

Experience FROG Fresh Mineral Water® that's:

• Cleaner and clearer
• Noticeably softer
• Easier to maintain
• Gentler on hot tub and deck surfaces

Perfect For:

Hot tub owners who want to:

• Minimize maintenance time
• Enjoy softer, more comfortable water
• Reduce chemical exposure
• Maintain consistent water quality

Enjoy your hot tub experience much, much more with FROG Serene – where science meets simplicity for the ultimate in spa water care. No mess, no guess, no stress – just pure relaxation in crystal clear,  perfectly balanced water.

For optimal performance, replace mineral cartridge every 4 months or when draining/refilling hot tub. Bromine cartridge life varies based on tub size and usage (typically 2-4 weeks per cartridge).

FROG Serene Replacement bundle for the FROG Serene Floating System or FROG Inline System (an approximate 4-month supply).  

This Value Pack includes:

• 1 FROG Sanitizing Mineral Cartridge (lasts approximately 4 months)

• 4 Bromine Cartridges (last up to 4 weeks each)

• Free Shipping within the contiguous 48 States

Say goodbye to complicated hot tub maintenance and hello to crystal-clear, fresh mineral water.   Compatible with the FROG Serene Floating System for spas up to 600 gallons or Frog Inline Cartridge Systems.  This FROG Serene Mineral Refill Cartridge bundle delivers everything you need for months of effortless spa care, combining the power of natural minerals with a very low level of bromine to kill bacteria in 2 ways.  

The Science of Serene Water

Unlike traditional chlorine sanitizers, FROG Serene allows you to set it and forget it for weeks at a time. The innovative dual-action system harnesses the natural power of minerals to eliminate contaminants while using up to 50% less bromine than conventional methods. This results in soft feeling water that's noticeably gentler on your skin, swimsuits, and spa surfaces. 

Why Choose FROG Serene:

• Pre-filled cartridges eliminate all of the measuring and guesswork

• Dual-action sanitizing with minerals and low-level bromine eliminate organic contaminates in 2 ways.

• Creates Fresh Mineral Water®∞ with less odor for a superior spa experience

• Perfect for busy hot tub owners who want hassle-free maintenance

Smart Design, Effortless Maintenance

Forget the daily routine of scooping harsh chemicals... FROG Serene's prefilled cartridges make maintenance as simple as replacing a cartridge about once a month. The mineral cartridge works continuously for four months, while the bromine cartridges maintain optimal sanitization for up to four weeks each, depending on your spa size and usage frequency.

The FROG Advantage

While traditional sanitizers can be difficult to maintain and unpredictable, FROG Serene's bromine-based system remains stable even during pH fluctuations, ensuring consistent sanitization. The mineral technology not only reduces chemical usage but also conditions the water, creating a noticeably different water quality and that serene feeling  you are looking for.

Experience the difference of Fresh Mineral Water®∞:

• Silky-soft feel

• Reduced chemical odors

• Crystal clear clarity

• Enhanced comfort

• Gentler on skin and eyes

Frog Serene is Perfect For:

• Hot tub owners seeking easy water treatment solutions that really work

• Those sensitive to traditional, harsh spa chemicals

• Anyone wanting to reduce their chemical usage

Make every one of your Spa sessions more serene with FROG Serene – where innovation meets relaxation. Finally, relax, and enjoy weeks of pristine spa water without the hassle of daily maintenance.

*Based on a comparison to the minimum USEPA recommended chlorine or bromine level of 2.0 ppm for a hot tub.

∞Fresh Mineral Water is a registered trademark of King Technology, Inc.

FROG Serene 200 Gram Bromine Replacement Cartridge Single Pack (adjust to any desired quantity in your shopping cart). 

This longer lasting 200-gram cartridge (green) works seamlessly with FROG Serene In-Line and FROG Serene Floating Sanitizing Systems to keep your spa water pristine with minimal effort.  Can be used to replace the 150-gram FROG Bromine Cartridge (yellow).

Works along with the FROG Serene Mineral Cartridge for use in:
• FROG Serene (formerly Spa FROG) Floating Systems
• FROG Serene In-Line Systems

The Smarter Way to Sanitize

Unlike traditional chlorine, this bromine cartridge is specifically engineered for hot water applications. The slow-dissolving formula maintains consistent sanitization levels without the harsh chemical smell. When paired with FROG Sanitizing Minerals (sold separately), this system eliminates organic contaminants through dual-action protection while using up to 50% less bromine than traditional methods.*

Key Benefits:
• Reduces bromine usage by up to 50%*
• Gentler on skin, hair, and swimwear
• Minimal chemical odor
• Easy-to-adjust dial for precise control
• 2-4 week cartridge life
• Recyclable packaging

Smart Design Features:
• Pre-filled for mess-free replacement
• Adjustable settings to match your spa's needs
• Compatible with FROG Serene mineral cartridges
• Simple drop-in installation on Spas with FROG built-in inline systems.

Better for You, Better for Your Spa
The FROG Serene system doesn't just make maintenance easier—it creates a superior soaking experience. When used with FROG Sanitizing Minerals, this cartridge helps condition your water for optimal softness while maintaining balanced pH levels. Say goodbye to constant water testing and hello to more relaxation time.

Installation:
Simply insert into your FROG Serene Floating System or In-Line System alongside the Mineral Cartridge (sold separately). Adjust the dial setting according to your spa's specific needs and replace every 2-4 weeks for continuous protection.

Package Contents:
• 1 x 200-gram Bromine Cartridge
• Compatible with all FROG Serene systems

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

Note: For optimal results, always use with FROG Sanitizing Minerals (sold separately). Follow manufacturer instructions for proper installation and maintenance.

Spa FROG Serene 200 Gram Bromine Cartridges for FROG Inline Hot Tub Systems (3-pack) - Free Shipping

FROG Bromine Refill Cartridges for use in conjunction with the FROG Serene Mineral Cartridge for a hassle-free solution to hot tub maintenance.   This smart, self-contained cartridge works with your Spa Frog System to deliver precise amounts of bromine sanitizer, taking the guesswork out of water care.

Why You'll Love It:

• Lasts 2-4 weeks per cartridge
• Uses up to 50% less bromine than traditional methods
• Gentler on skin, hair, swimsuits, and spa surfaces
• No measuring or daily monitoring needed
• Recyclable empty cartridges

Perfect Water, Less Work
Unlike chlorine, bromine maintains its effectiveness in hot water and adapts to pH changes, making it ideal for spas. When paired with FROG Sanitizing Minerals, this system creates Fresh Mineral Water that eliminates contaminants through two powerful methods while keeping your water crystal clear and perfectly balanced.

Compatible Systems
Designed for use with Spa Frog floating and inline systems, including select models from:

• Marquis Spas
• Artesian Spas
• Caldera Spas
• Hot Spring Spas

Simple to Use
Just dial in your desired bromine level based on your spa's needs, snap the cartridge into place, and enjoy weeks of crystal-clear water. For optimal performance, replace your Mineral Cartridge every 4 months and the Bromine Cartridge every 2-4 weeks.

You and your family deserve the best spa care possible, and the Frog Spa Bromine Cartridge delivers just that - clean, comfortable water without the complexity of traditional sanitizing methods.