Innovative color development technology provides consistently accurate results and reliable test data, supported by inert material to balance water values. Immediate visual readout: color change is visible within 10 seconds, and the included color chart enables quick interpretation for efficient testing and management of water quality. Individually wrapped protection: 100 spa test strips are individually sealed to preserve freshness and responsiveness. The packaging is designed to provide long-term reliable performance under frequent use. Broad applicability: straightforward water quality checks for pools and spas, with reliable performance for all common water testing needs without complicated handling. What you get - 100 individually sealed spa test strips - Color chart for easy interpretation - Inert material backing to help balance water values - Color development technology for stable, repeatable results Use scenarios - Regular home pool maintenance: perform quick daily checks to confirm water balance and safety before swimming. - Spa or hot tub upkeep: test after refilling or heavy use to ensure balanced water and comfortable spa experiences. - Frequent testing in facilities: on-site rapid tests during service rounds without complex procedures, enabling efficient water management.