Common salt, Sodium Chloride (NaCl) is commonly used in the health care and maintenance of fishes, especially Koi. Salt is useful in treatment for various problems.
Salt Level Test Kit quickly and accurately measures the salt level in pond water. Fish need specific electrolyte concentrations (potassium, sodium, chloride and magnesium) to carry oxygen across gill membranes, and pond salt is a great source of electrolytes. Salt testing helps guard fish from the effects of toxic nitrite, and protects pond plants that are salt sensitive.
Test salt level before adding salt to pond! Salt does not dissipate from pond water.