Eliminating Metals

Copper and Iron in spa water can discolor water or stain the surface. Metals can sometimes enter spas through fill water, or, more often, through corrosion of the heater in the spa itself. Add a stain and scale control according to dealer recommendations to chelate metals in the water.

To prevent the introduction of metals due to equipment corrosion, maintain proper water balance according to dealer recommendations. These recommendations may vary depending on spa type, so be sure to consult with a local dealer if you have any questions.

Staining on spa surfaces from metals can be removed by draining the spa and cleaning with a light acid bath or other acidic surface cleaner. Consult the spa manufacturer recommendations for instructions on cleaning the spa surface.

Manganese must be removed differently, since it does not respond well to stain and scale control products.

Slowly chlorinate or brominate the spa water with tablets, a floater, or granular product until the manganese fall out of solution (You will see the water discolor). Continuously filter the spa until the water clears, then clean the filter with a spa filter cleaner.

Note: This information is intended for a residential spa with average use.  It is not designed for public, commercial, or semi-public spas.  If your hot tub is used more than three times per week, you should check and make chemical additions more often than suggested.