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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
2013–2026
it reactivates existing sanitizers while keeping water clear
This filter set is designed to remove heavy metals
Easy-read single color matching
(Note: Bromine use is not recommended for use with Eco Pur filters
Master Clear - Alkalinity Up 2lb. 2001-master-spas-850-cs-filters-esi2133805 2013–2026Master Clear Alkalinity Up 2lb. Maintain perfectly balanced spa water with Master Clear Alkalinity Up. This essential water balancing formula raises total alkalinity to help stabilize pH levels, prevent corrosion, and reduce equipment wear. By minimizing pH bounce, it improves sanitizer efficiency and enhances overall water clarity and comfort. Fast dissolving and easy to apply, Master Clear Alkalinity Up is ideal for hot tubs and spas, helping
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