Lisyee Replacement Bromine Cartridges Compatible with Hot Tub Frog Serene Floating System for up to 600 Gallons 4 Packs

["1️⃣Universal Compatibility‌: These Hot Tub Bromine cartridges is compatible with FROG Serene Floating System for Spas up to 600 gallons.","2️⃣Deliveries Clean Water: Slow-release technology maintains optimal water clarity with reduced 50% less *Bromien levels.","3️⃣Long-Lasting Water Clarity: Keep your water crystal clear for Includes 4 *Bromien Cartridge that lasts 2-4 weeks depending upon hot tub size and usage.","4️⃣Water Care‌: Combines *Bromien work with minerals (sold separately) dispersion to balance p H and soften water, enhancing user comfort. Easy setup.","5️⃣Service Guarantee: If you have any questions about cartridges, please feel free to contact us, we are committed to offering high-quality products and providing efficient customer service."]