I know that pond salt can be quite beneficial to my pond and koi and goldfish, but I am baffled as to how much salt to use.

As far as adding Pond Salt to your pond, it is recommended that you distribute the salt around the perimeter of the pond. I also suggest making sure that you have a good idea of how many gallons your pond holds. The way I figure out gallons on a pond is to use the following formula:

(LENGTH x WIDTH x AVERAGE DEPTH) x 7.48 = Gallons

Then I deduct 15% from the total gallons as I factor in the pond is not a perfect square and that the sides are tapered. If you have pond plants in your pond, you want to use a lower dosage of salt. It is suggested that you add 1 1/4 cup of salt to every 100 gallons of pond water. If you do have pond plants in your pond, then you can increase the salt level by adding 2 1/2 cups of salt to every 100 gallons of pond water. To figure out what your pond’s salinity level is, I suggest the use of a digital salinity meter. Just to re-cap, always remember that once salt is added to your pond, it will not evaporate and cannot be filtered out by a pond filter. Only add salt when you physically do a water change and watch the amount you add!

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