SoftSwim Stain Control (1 qt) Scale Apply 2 tablespoons (4 capfuls)

Apply 2 tablespoons (4 capfuls) per 300 gallons directly to spa with pump running

If below 40ppm

Add one full bottle of Spa Marvel Cleanser into the existing water

Subsequent additions of 4 to 9 fluid ounces of this product per 10

SoftSwim Stain Control (1 qt) Scale Apply 2 tablespoons (4 capfuls)BioGuard's SoftSwim Stain Control helps prevent metals from settling in the water and staining pool surfaces. This product is intended for use in swimming pools with plaster surfaces, or on any surface where dissolved metals such as iron, copper and manganese are present. SoftSwim Stain Control also helps maintain the presence of SoftSwim B and C. Each SoftSwim product is formulated to work specifically with the biguanide chemistry of the SoftSwim