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I want to be able to measure salt in my pond. How is that done?

Salt is often used as a remedy for parasites, or an "osmotic" balm for sores and ulcers in the skin of fish. The usual amount of salt applied to a body of water is three pounds of salt per one hundred US gallons of water. In tanks, they use 1 tablespoon of salt per gallon. There are precautions (Look it up!)

Help With Koi Problems
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Later, how can you tell how much salt is in there, for example; after a water change?

There are four methods currently in use to tell about the salinity in the water.

I can, after all these years, usually estimate the salinity by taste. Enough about that.

You can make a salinity meter as described in the Book. (Look it up!)

You can buy a salt level test kit. This kit was originated by Aquarium Pharmaceuticals - and uses a couple of liquid reagents and a simple test-tube to run a test for salt levels. The number of drops of the reagent which are needed to change the color of the solution correlate to a very SPECIFIC salinity level. The AP Salinity test kit is VERY accurate. It's also simple to run. ( has these kits for sale.

The fourth method is with an electronic device, a Salinity Meter, manufactured under the brand name "Koi Medic" and costing well under 100$ this meter is long lived, accurate and easy to use. It comes with instructions but it is about this simple: Turn it on, dip it in the pond, read the result. They are sold at most retailers and online

Fish disease problems? Need some help? The help pages take you through the basics of the 'fish health work-up' diagnosis method and basic fish disease treatment methods.

90% of all health problems and fish deaths are caused by poor fish keeping! The key pages are essential reading for all beginners and intermediates who are serious about disease prevention.

Expanded Content by Dr. Erik Johnson, and Used with Permission; Frank Prince-Iles ©2009 All Rights Reserved