Check the listing for details. KOI NITRO Nitrofurazone Powder for Fish Ponds - 200 Grams. Condition: New. Listed at 159.99 USD. KOI NITRO by Koi Pond Rescue is a highly effective anti-bacterial and anti-microbial treatment for newly arriving fish. Extremely safe, KOI NITRO nitrofurazone powder is ideal for koi, ornamental fish, freshwater and saltwater fish. Not as harsh on weaker fish as other treatments, KOI NITRO pure nitrofurazone powder is also an excellent choice for disinfecting tanks and ponds. The professional’s choice, KOI NITRO is an ideal treatment for many common fish bacterial issues including Columnaris, Flexibacter, Bacterial Gill Disease, Aeromonas Bacteria, Mouth, Fin, and Tail Rot. Nitrofurazone is not recommended for use in reef tanks and may leave your water with a slight yellow tint after treatment is completed. This yellow tint will fade over time with water changes. Features:HIGHLY EFFECTIVE TREATMENT: KOI NITRO is a highly effective anti-bacterial and anti-microbial treatment for common issues impacting koi, freshwater and saltwater fish.PRECISE DOSAGE: Including handy scoop makes proper dosing extremely simple. Each level scoopful equals one gram. One gram KOI NITRO treats 30 gallons aquarium water while 50 grams KOI NITRO treats 1,500 gallons pond water. UNMATCHED PURITY: For maximum effectiveness KOI NITRO is 100% pure nitrofurazone powder, a highly effective fish treatment used in aquaculture. No fillers or additives.EXTREMELY SAFE: Not as harsh on weaker fish as other treatments.GUARANTEED FRESHNESS: KOI NITRO is manufactured immediately before shipment and comes in a resealable container to ensure maximum freshness to ensure potency of powder.