Stains or water discoloration on the whirlpool/jacuzzi/swim spa surface

Stains or water discoloration on the hot tub/jacuzzi/swim spa surface

It happens that the water in the hot tub/jacuzzi/swim spa becomes discolored. The cause in this is usually due to very high concentration of metal ions (iron, zinc or copper) in the water.

Here are a few useful explanations:

Brown or black
Cause: high manganese content

Reddish brown or red
Cause: rust

Greenish discoloration
Cause: algae at most, high iron or copper

The percentage of various metals in the hot tub/jacuzzi/swim spa water depends on the water used to fill the hot tub/jacuzzi/swim spa. This percentage may vary from area to area. Other causes may include:

Alkalinity too low:
Alkalinity can be increased with "Alkalinity Increaser"

Calcium value of the hot tub/jacuzzi/swim spa water is too low:
Increase with "Calcium Booster"

pH value too low:
Increase by "pH-Plus"

This discoloration must be neutralized. This is done in the following steps:

• Measure the pH value and then adjust it accordingly.
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• Add "Metal Gon" to the whirlpool/jacuzzi/swim spa water.

• Filter the whirlpool/jacuzzi/swim spa water for a few hours. Then clean the filter with filter cleaner.

• Now add an algaecide (algaecide) to the hot tub/jacuzzi/swim spa water.

If deposits have already formed on the water surface, drain the hot tub/jacuzzi/swim spa. You can clean the water surface with "Citra Bright". For this purpose, we recommend a mineral fiber cloth as a cleaning sponge.

Then seal the whirlpool/jacuzzi/swim spa surface with "Fast Gloss" and fill it again. After that, you should immediately add a bottle of "Metal Gon" and clean the filter two to three hours later.