Check the listing for details. Sirona Spa Care Phosphate Remover + - 2 Pack. Condition: New. Listed at 45.98 USD. Sirona Spa Care Phosphate Remover + is a concentrated liquid designed for weekly use, effectively eliminating phosphates from spa water. This multifunctional product clarifies water and prevents waterline buildup, offering a comprehensive solution. Product Features: Phosphate Remover+ is compatible with all sanitizers 3-in-1 concentrated formula removes phosphates, clarifies spa water and prevents waterline buildup for clean, relaxing results Sirona Specialties maintain restorative spa water and transform every spa into a soothing sanctuary Directions: Shake well before using. With the circulation system running, add 1 teaspoon of Sirona Spa Care Phosphate Remover + into the skimmer weekly for up to 500 gallons of spa water. Continue to pump at least 12 hours after applying the product.