Ruby Reef HydroPlex NANO Concentrated Formula Aquarium Water Treatment, 64-oz bottle; Ruby Reef HydroPlex NANO is a broad-spectrum, copper-free, antibiotic-free dip for new finned friends who will be joining the tank. A simple ten-minute dip in this scientifically developed formula will help to eliminate problems that can be brought on by new fish being introduced into the aquarium. This special treatment is designed to remove active parasites, bacteria, fungus and other organisms attached to or embedded in the flesh, gill tissues, ascending vasculature and surrounding structures of the new fish. The unique blend also helps heal open wounds and can be used effectively in hospital and quarantine tanks. Your new fish will be welcomed to the tank after a quick dip in HydroPlex Nano.