Keep your fish tank safe and healthy with Waterlife Sterazin Aquarium Fish Tank Parasites Gill & Body Fluke Worms 500ml. This medication is specially designed to treat external parasites in freshwater aquariums. It is formulated to target parasites such as gill and body fluke worms for a quick and effective solution. This will treat upto 3,000 litres! Made by Waterlife, a trusted brand in aquarium treatments, this medication is perfect for those who want to keep their fish tank in top condition without worrying about external parasites. Use this product as directed for best results.