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.
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Things you need
- Pond salt
Measure out 35.4gr. of pond salt for every 10 gallons of water in your pond and put it in a bucket.
Add enough water to the bucket so the salt dissolves and you can easily pour the mixture into the pond.
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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