Extensive research has resulted in the creation of this product which has been specially developed for the treatment of the resistant flukes which are now causing serious problems in koi. It uses a combination of a special formulation of praziquantel which easily and rapidly dissolves in ponds and tanks, combined with nitroscanate and emamectin benzoate. This can be seen dispersing through the water as soon as you add it to your pond or tank. It can be used in the presence of salt when added as a therapeutic. Fish can be fed normally during treatment. Safe with biofilters and plants.