Читать книгу Fundamentals of Aquatic Veterinary Medicine - Группа авторов - Страница 35

Chlorine is harmful/toxic to fish at values greater than 0.03 ppm. Tap water may range from 4.0 to 8.0 ppm. Sodium thiosulfate can be used to neutralize the chlorine. Chlorine may be used to disinfect equipment, tanks, countertops, and nets at 10 ppm for 24 hours or 200 ppm for 30–60 minutes. Effectiveness is reduced by organic material such as mud, slime and plant material. Sodium hypochlorite is available at concentrations of 15%, 50%, or 65% active.