Model # B
Especially designed to prevent scale formation in spas and hot tubs.
16 ounces .
Control of calcium can be very challenging, especially in spas. Regular use of Defender will prevent mineral buildup from occurring and causing the spa's heater or equipment to fail. Use as a follow-up to Metal Gon , applied at start-up.
Chlorine, bromine, ozone and biguanide sanitizers.
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