Safe & Effective Spa Mineral Sticks Made from high-quality, durable, and odorless ABS plastic, these expertly designed spa mineral sticks are safe for use. The minerals inside effectively absorb impurities, creating a cleaner, safer spa environment. Easy Installation Simply place the stick in your existing filter – no need to disrupt your existing flow. Natural Mineral Enrichment Eliminate odors, enhance spa performance, and enjoy crystal-clear, fresh water without harsh chemicals. Wide Compatibility Suitable for a variety of spas and hot tubs, including Jacuzzis, inflatable tubs, alcove tubs, walk-in tubs, whirlpools, spa boats, and standard tubs. Installation takes seconds. Ideal Choice Treats up to 500 gallons (2000 liters). Our low-maintenance, cost-effective cartridge lasts 4-6 months, saving you time and money. Authentic Hot Spring Experience Our natural hot spring mineral paste automatically adds trace elements, reducing impurities for clearer, cleaner water and a relaxing, natural hot spring feel. Package Includes 2 yellow spa filter sticks only. Other accessories are not included.