Kordon Rid-Ich is an effective control of diseases caused by external protozoan parasites and fungal infections of fishes. It will not harm biological filtration. It will color the water and should not be used with any other medication.
Will not harm biological filtration
For fresh and saltwater
Controls Ich and other external protozoan, dinoflagellate and fungal diseases of fishes
Good for freshwater and saltwater ponds.

Freshwater Ich, Costia, Trichodina, Velvet, Chilodenella, Saltwater Ich

Specifications: Contains formaldehyde (11.52% formalin) U.S.P. grade 4.26% and premium quality zinc-free chloride salt of malachite green 0.038%. Made in the U.S.A.

Dosage: Use 1 teaspoon (approximately 5 ml) per 10 gallons of water. This produces a concentration of 15 ppm formalin and 0.05 ppm of malachite green. When used at the recommended concentration, 16 ounces of Pond Rid·Ich+ will treat 960 gallons of water. Before each successive treatment and the day after the last treatment do a partial water change of 25% of the water. For further instructions on treatment methods see Kordons Rid-Ich+.