Keep a tag attached to the pool or spa skimmer basket until it changes colour, indicating when metals are present, and action is needed.
Directions: Connect the Metal Identification Tag to the skimmer basket. After a few days, hold the identification tag up to the sunlight and look for a colour change. Any colour change indicates whether metals are present. Use the colour chart to identify the metal causing the stain.
Copper Indicated – Blue
Iron Indicated – Brown/Red
Cobalt Indicated – Red
Nickel Indicated – Green
