Spa Choice 472-3-2021 Filter Clean and Clear Stain Remover for Spas, 1-Quart Degreases spa & hot tub filters and improves filter efficiency Spa Choice Filter Clean & Clear is a liquid product that greatly improves spa filter life and efficiency Filter Clean & Clear is specially made to cleanse suntan oil and grease as well as scale and mineral deposits Downloadable User Guide Available Under Product Information: Technical Specifications