Diagnosing fish diseases and dosing medications can be tricky and stressful for you and your fish. Aquarium Pharmaceutical's powdered medications help to take the guesswork out of treatment and make medicating your fish easier and more effective. Each medication is premeasured in multiple layer foil packets and is formulated to be quick dissolving. A full range of medications mean most ornamental fish diseases are easy to treat so you can spend more time enjoying your fish; not medicating them. Effectively treat many gram-positive and gram-negative bacterial diseases like aeromonas and columnaris quickly and easily in both freshwater and saltwater aquariums. This product cannot be shipped to Canada.