Metal Gon sequesters iron, copper,
and other metal buildups in the water to prevent staining on
spa surfaces.
When spa water is aerated by the air blower and there is iron
present in the water, oxidation occurs allowing iron to come
out of the water and deposit on the spa's finish. Metal Gon
will keep iron from oxidizing and, therefore, will keep iron
from depositing and staining the finish.