Bioguard Defence is also known as Stain and Scale Control.
– 133g/L Organic Phosphonates.
– Prevents calcium and magnesium ions present in hard water from precipitating out of solution.
– Helps to prevent staining from metals like copper, iron and manganese.
– Prevents scale build-up.
– Helps keep spa water clear.
– Removes some fresh metal stains.
– Protects spa surfaces.