Free $15 Visa® eGift Card with FROG® @ease+™, Nov. 1–30 only! Find Out More

Find a Dealer

FROG Serene® Bromine Cartridge 150g

Replacement Bromine Cartridge for the FROG Serene Floating System

Set it and forget it. Dispenses a consistent amount of bromine for sparkling clean water. Paired with the FROG Serene® Mineral Cartridge, the system uses up to 50% less bromine* to create Fresh Mineral Water*∞ that’s softer and easier on skin, swimsuits and spa surfaces.

Starting at $15.95

Find a Dealer

* Compared to the minimum ANSI recommended bromine level of 2.0 ppm for a hot tub
∞ Cleaner, Clearer and Softer water for pools, hot tubs and swim spas

Benefits

  • No harsh odor
  • Prefilled for No Mess, No Guess, No Stress™
  • Replace every 2-4 weeks, depending on use
  1. Remove the floating system from the hot tub and let the water drain from the cartridges.
  2. Detach the old yellow Bromine Cartridge from the holder. and confirm it is empty. Discard in the trash.
  3. Set the dial on the the new 150g Bromine Cartridge to the same number setting you used before.
  4. Push or snap the new Bromine Cartridge securely into the open slot of the floating holder alongside your blue Mineral Cartridge (if the minerals are still within their 4-month lifespan).
  5. Place the floating system back into the hot tub.
Front of the yellow FROG Serene Bromine Cartridge, on a white background.
Back of the yellow FROG Serene Bromine Cartridge showing the directions, on a white background.
Two women relaxing with eyes closed in a hot tub surrounded by tall trees.

Frequently Asked Questions

Hot tubs with 150 to 600 gallons are perfect for FROG Serene.

The yellow FROG Serene Bromine Cartridge with 150g is used with the FROG Serene Floating System. Simply insert it into one opening of the floating holder with the Mineral Cartridge in the other opening and set in the hot tub.

If you are tired of smelly chlorine odors and having to spoon in chemicals every time you use your hot tub, FROG Serene is for you. FROG Serene is not just bromine, it also contains FROG Sanitizing Minerals® that destroy bacteria so you can use up to 50% less bromine*.

Typically 2-4 weeks, but it can vary depending on hot tub size and usage.

Let’s Connect

We’re here for you, weekdays 8-5pm.

Have a question or need a suggestion? Contact us for direct assistance, or send an email and we’ll respond within 24 hours.

EMAIL
customerservice@
frogproducts.com

CALL
1-800-222-0169

LIVE CHAT
8-5pm CST

Related Products

Complete water care has never been so simple.

Shop these related hot tub water care products.

Front of the blue FROG Serene Mineral Cartridge for the FROG Serene In-Line or Floating System, on a white background. FROG Serene® Mineral Cartridge
FROG Serene Cartridge Kit with one mineral cartridge and three bromine cartridges in carry-handle packaging, on a white background. FROG Serene® Cartridge Kit
FROG Test Strips for pools and hot tubs, 50 strips, in blister packaging, on a white background. FROG® Test Strips
Front of a 1.5 oz. FROG Jump Start packet for hot tubs up to 600 gallons, on a white background. FROG® Jump Start®
Front of a 2 oz. FROG Maintain Non-Chlorine Oxidizing Maintenance Shock packet for hot tubs up to 600 gallons, on a white background. FROG Maintain®
Front of a single-use FROG Hot Tub Pipe & Jet Cleanser packet for hot tubs up to 600 gallons, on a white background. FROG® Hot Tub Pipe & Jet Cleanser Packet
Front of a FROG Hot Tub Pipe & Jet Cleanser tube, on a white background. FROG® Hot Tub Pipe & Jet Cleanser Tube
Front of the FROG Balancing Basics Kit box for hot tubs and swim spas, listing the five included balancers, on a white background. FROG Balancing Basics® Kit
Front of a red and white FROG TArget Total Alkalinity Increaser container, on a white background. FROG TArget® Total Alkalinity Increaser
Front of an orange and white FROG DropH pH Decreaser container, on a white background. FROG DropH™ pH Decreaser
Front of a green and white FROG JumpH pH Increaser container, on a white background. FROG JumpH® pH Increaser
Front of a blue and white FROG SooTHe Total Hardness Increaser container, on a white background. FROG SooTHe® Total Hardness Increaser
Front of a yellow and white FROG StoMPS Non-Chlorine Oxidizing Shock container, on a white background. FROG StoMPS® Non-Chlorine Shock
Front of a 16 fl oz white bottle of FROG Defoamer for hot tubs and swim spas, with a light blue label and a flip-top cap. FROG® Defoamer
Front of a 16 fl oz white spray bottle of FROG Surface & Cover Cleaner for hot tubs and swim spas, with a light blue label and a trigger sprayer. FROG® Surface & Cover Cleaner
Front of a 16 fl oz white bottle of FROG Metal Remover for hot tubs and swim spas, with a light blue label and a screw cap. FROG® Metal Remover
Smartphone showing the FROG® Water Care App home screen with a personalized greeting, a preferred dealer card for Poolwerx in Minnetonka, and a “Test my water” button below a photo of a couple relaxing in a hot tub.

Have a Water Care Expert in the Palm of Your Hand

Download the free FROG Water Care® App

Sign Up for Our e-Newsletter

No spam, just seasonal tips, product spotlights and simple ways to simplify your water care.

Sign Up