Looking to treat a bacterial or fungal problem in your freshwater or saltwater pond? Kana-Cura is a high-end, professional-grade treatment that is mild on filter beds. Safe for both fish and most invertebrates. Kana-Cura is quick-acting; just 10 grams treats up to 400 gallons. If your fish can't or won't eat, Kana-Cura is absorbed through the skin and gills – which is ideal for sick fish. If your fish is suffering from popeye, dropsy, fin rot, septicemia, tail rot, or other bacterial or fungal fish pathogens, look no further.