--- product_id: 645141345 title: "Serene Floating Sanitizing System + 2 Bromine Cartridges for Hot Tubs, Quick and Easy Self-Regulating Hot Tub Sanitizer with Bromine and FROG Sanitizing Minerals" brand: "frog" price: "$461.18" currency: USD in_stock: true reviews_count: 5 category: "Frog" url: https://www.desertcart.us/products/645141345-serene-floating-sanitizing-system-2-bromine-cartridges-for-hot-tubs store_origin: US region: United States of America --- # 4-month mineral cartridge life 50% less bromine for softer water 2-way bacteria kill tech Serene Floating Sanitizing System + 2 Bromine Cartridges for Hot Tubs, Quick and Easy Self-Regulating Hot Tub Sanitizer with Bromine and FROG Sanitizing Minerals **Brand:** frog **Price:** $461.18 **Availability:** ✅ In Stock ## Summary > 💦 Elevate your soak with smarter, softer, and effortlessly cleaner water! ## Quick Answers - **What is this?** Serene Floating Sanitizing System + 2 Bromine Cartridges for Hot Tubs, Quick and Easy Self-Regulating Hot Tub Sanitizer with Bromine and FROG Sanitizing Minerals by frog - **How much does it cost?** $461.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/645141345-serene-floating-sanitizing-system-2-bromine-cartridges-for-hot-tubs) ## Best For - frog enthusiasts ## Why This Product - Trusted frog brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Maintenance:** Prefilled bromine cartridges last 2-4 weeks, eliminating daily dosing guesswork. - • **Consistent Water Quality:** Bromine dissolves slowly in hot water, ensuring stable sanitation with less odor and pH sensitivity. - • **Gentle on Skin & Surfaces:** Reduced bromine levels mean softer water that’s kinder to skin, swimsuits, and hot tub interiors. - • **Dual-Action Sanitizing Power:** Combines FROG Sanitizing Minerals™ with bromine for superior bacteria elimination. - • **Long-Lasting Mineral Cartridge:** Blue mineral cartridge keeps water fresh for up to 4 months or until refill. ## Overview The FROG Serene Floating Sanitizing System uses a patented dual-action approach combining bromine and FROG Sanitizing Minerals™ to kill bacteria effectively while reducing bromine use by up to 50%. Designed for hot tubs up to 600 gallons, it simplifies maintenance with prefilled bromine cartridges lasting weeks and a mineral cartridge lasting up to 4 months. This system delivers clearer, softer water that’s gentler on skin and hot tub surfaces, with less odor and more stable sanitation than traditional chlorine or bromine methods. ## Description FROG Serene Floating Sanitizing System kills bacteria 2 ways, with FROG Sanitizing Minerals™ and up to 50% less bromine*. With less bromine you'll enjoy softer feeling water that's easier on skin, swimsuits and hot tub surfaces. FROG Serene eliminates the work and guesswork of keeping your hot tub water clean. Instead of spooning in chlorine daily, you simply replace a prefilled bromine cartridge every 2 to 4 weeks depending on your hot tub size and usage. The blue Mineral Cartridge lasts 4 months (or until you drain and refill your hot tub). The system comes with one Bromine Cartridge, one FROG Sanitizing Minerals™ Cartridge, FROG Jump Start, a start-up shock, and FROG Test Strips, it’s ideal for hot tubs up to 600 gallons. The Mineral and Bromine Cartridge quickly and easily snap into the reusable green holder. FROG Serene creates Fresh Mineral Water® in your hot tub – something no one else does. *Compared to the minimum ANSI recommended bromine level of 2.0 ppm for a hot tub. Review: Best decision we've made about hot tub maintenance. It has saved us so much hassle and has lasted over a month for the first yellow cartridge. The water looks clear, clean, and smells good. Very happy I stumbled across this product. Review: First time using a bromide sanitizer for my spa . This product was recommended by my knowledgeable salesperson. It has both mineral and bromide for clear water quality, no smell like chlorine sanitizers . Bromide works best in hot water spas and dose not break down as fast chlorine. Keeps my spa levels in the right area for use . ## Features - FROG Serene (formerly Spa FROG) Floating System includes 1 Bromine Cartridge, 1 FROG Sanitizing Minerals Cartridge, 10 FROG Test Strips and One FROG Jump Start startup shock - FROG Serene kills bacteria 2 ways with a low level of bromine plus FROG Sanitizing Minerals, plus bromine use is reduced up to 50%* so water feels more comfortable - Unlike chlorine, bromine slowly dissolves in hot water so it’s easier to regulate, has far less odors and is less impacted by pH swings making sanitizing more effective - Two additional Bromine Cartridges give you weeks and weeks of ahhmazingly Cleaner, Clearer, Softer water that’s easier to care for. - FROG Sanitizing Minerals plus a low level of chlorine kill bacteria 2 ways – your pool stays Cleaner, Clearer, Softer and is Easier to care for ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B893LFT7 | | Brand Name | FROG | | Customer Reviews | 4.6 4.6 out of 5 stars (448) | | Item Form | Granular | | Item Type Name | Replacement Cartridge | | Manufacturer | FROG | | Manufacturer Part Number | 0G-EBTP-4L63 | | Model Number | 9004 | | Number of Items | 5 | | Product Benefits | Kills Bacteria | | UPC | 722906005254 | | Unit Count | 1 Count | ## Product Details - **Brand:** FROG - **Item form:** Granular - **Number of Items:** 5 - **Product benefits:** Kills Bacteria - **UPC:** 722906005254 ## Images ![Serene Floating Sanitizing System + 2 Bromine Cartridges for Hot Tubs, Quick and Easy Self-Regulating Hot Tub Sanitizer with Bromine and FROG Sanitizing Minerals - Image 1](https://m.media-amazon.com/images/I/81syAdoCbYL.jpg) ## Questions & Answers **Q: How long do the mineral and bromine cartridges last?** A: The blue mineral cartridge lasts 4 months or whenever you drain you drain your hot tub. The yellow bromine cartridge lasts 2 to 4 weeks depending on the size of your hot tub and how often it is used. **Q: What are the benefits of using bromine instead of chlorine to sanitize my hot tub?** A: Bromine can be an excellent alternative to chlorine for hot tubs – it is gentler on your skin, eyes and respiratory system which makes it a better option for users with sensitive skin or allergies. It also has a milder odor compared to chlorine. **Q: How is FROG Serene different from traditional sanitizing methods?** A: If you are tired of chlorine odors and measuring chemicals, FROG Serene is for you. FROG Serene is not just bromine – it uses minerals to create Fresh Mineral Water in your hot tub. Prefilled cartridges eliminate guessing and handling of chemicals. **Q: What is Fresh Mineral Water?** A: FROG’s Sanitizing Minerals and a low level of bromine make cleaner, clearer, softer water that's easier to take care of. It's sanitized water without the harshness of other products and with prefilled cartridges it's much easier too. **Q: What's included in the box?** A: 1 FROG Serene Floater, 1 FROG Serene Mineral Cartridge, 3 FROG Serene Bromine Cartridges, 1 FROG Jump Start Packet and 10 FROG Test Strips ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by L***A on 26 January 2026* Best decision we've made about hot tub maintenance. It has saved us so much hassle and has lasted over a month for the first yellow cartridge. The water looks clear, clean, and smells good. Very happy I stumbled across this product. ### ⭐⭐⭐⭐⭐ Review *by J***N on 23 June 2025* First time using a bromide sanitizer for my spa . This product was recommended by my knowledgeable salesperson. It has both mineral and bromide for clear water quality, no smell like chlorine sanitizers . Bromide works best in hot water spas and dose not break down as fast chlorine. Keeps my spa levels in the right area for use . ### ⭐⭐⭐⭐⭐ Review *by J***L on 26 June 2025* My skin had become highly sensitive to chlorine, and it was really affecting how much I could enjoy my hot tub. Since switching to bromine with this system, it’s been a total game-changer. My skin no longer gets irritated, and I genuinely love and look forward to using my hot tub every day again. The combination of bromine and minerals keeps the water clean, balanced, and gentle—plus, it’s so easy to use. Couldn’t be happier! ## Frequently Bought Together - FROG Serene Floating System for Hot Tubs with 2 Replacement Bromine Cartridges - Prefilled Hot Tub Sanitizer - Hot Tub Maintenance System with Sanitizing Minerals & Bromine - FROG Maintain for Hot Tubs - Non-Chlorine Shock for use with All Hot Tub FROG Sanitizing Systems - Single Dose Packets for Easy Hot Tub Maintenance & Treatment - 12 Pack - FROG Serene Replacement Mineral Cartridge with 4 Replacement Bromine Cartridges for use with Hot Tub FROG Serene Floating Sanitizing System - Prefilled for Quick & Easy Hot Tub Maintenance --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/645141345-serene-floating-sanitizing-system-2-bromine-cartridges-for-hot-tubs](https://www.desertcart.us/products/645141345-serene-floating-sanitizing-system-2-bromine-cartridges-for-hot-tubs) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-10-15*