Oxalic acid - A cheap way to reduce the hardness of your water

Written on 30-06-2018 18:11 by cab

You can use oxalic acid to reduce the hardness of the water, if your only problem is the hardness.

Procedure

• Fill a large bowl with water
• Make a solution of oxalic acid
• Add so much oxalic acid solution (while stirring) that the pH becomes around 4-5
• Apply airiation for 12-24 hours to remove the large amounts of carbon dioxide (CO2)
• Stop the air and after 1 hour of resting the calcium will precipitate and land on the bottom as a white powder
• Tap the water without getting any of the white powder along (it is harmless though)

Now you can use the soft water - if required, you can mix it with regular water to get the hardness you need.

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