Not sure but I think we are the only ones who sell aquatic RUP's(Restricted Use Pesticides) in Indiana. Rotenone must be purchased by a licensed category 5 applicator for aquatics. We have been selling Rotenone for about $80-90 per gallon and that is in the 5 gallon container(which means you have to buy a minimum of 5 gallons). The price changes and you have to get a current cost from the manufacturer everytime you buy it. It is also available in 1 gallon containers. Most distributors do not keep this product on site and have it shipped directly from the manufacturer in Georgia which adds another $100-$150 depending on where you are. The state chemist located at Purdue can help you further with more info.