How to Put Salt in Koi Ponds

Written by ann lapan
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How to Put Salt in Koi Ponds
Koi do well with small amounts of salt in the water. (contented koi image by Geoff Hobbs from

Although it is a freshwater fish, koi can benefit from a very small amount of salt in pond water. That small amount, which would give the pond a salt percentage of no more than 0.1 per cent, can help keep a koi healthy by increasing its mucus coat. It can also reduce bacteria and parasites in the water that would otherwise affect the fish.

Skill level:

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Things you need

  • Pond salt
  • Bucket

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  1. 1

    Measure out 35.4gr. of pond salt for every 10 gallons of water in your pond and put it in a bucket.

  2. 2

    Add enough water to the bucket so the salt dissolves and you can easily pour the mixture into the pond.

  3. 3

    Pour the mixture gently into the edges of the koi pond.

Tips and warnings

  • Test the pond's salt level with a water testing kit before and after any salt treatment. The levels should never exceed 0.1 per cent.
  • Because salt does not evaporate, you should only add salt again if you do a full water change.

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