Scientifically formulated Reef-Safe water treatment for Cryptocaryon irritans (marine "white spot") and Ichthyopthirius multifiliis (freshwater ich). Engineered to attack the infectious free swimming stage of the ich life cycle and rid the aquarium of these harmful parasites. No-Ich is safe for all fish, invertebrates, corals, plants and biological filtration systems. 100% copper and malachite free solution. One liter treats up to 100 gallons. Self-Dosing bottle makes measuring and application simple and easy.