SpaGuard Soft Soak Chlorinating Granules 2# SpaGuard Soft Soak Chlorinating Granules 2# Soft Soak Chlorinating Granules is a one step sanitizer and oxidizer for spas and hot tubs Add directly to your spa water 1/2 tsp. per 100 gallons of spa water Repeat dosage until chlorine residual of 3-5 ppm is achieved