Aquarium Products Mardel Quick Cure is the fastest treatment for curing Ick producing results in only 2 days. Aquarium Products Quick Cure is an scientific formulation utilizing special zinc-free ingredients. Quick Cure is safe for Freshwater and Marine aquariums (though it should not be used with invertebrates). Powerful anti-parasite medication that cures Ick in 2 days!! Ideal for Freshwater and Marine aquariums Will not effect biological systems Effectively Treats: Ick, Mild Fluke Outbreaks, Gasping for Air, Flicking Against Rocks, Protozoan Parasites, Costia, Chilodonella and Trichodina Ick (Ichthyophtoirius Mulfifilis) are small ciliate protozoan cysts that look like sugar or salt granules. As these cysts mature, they fall off the fish and then divide into thousands of trophonts (like spores) that can populate your tank and attach all the other fish in your tank. Shake Well Before Using Before administering any medication, it is wise to check your water quality levels to ensure they are within their acceptable ranges. Remove carbon from filter before use. Add 1 drop per gallon daily for all fish except those of the Tetra group. FOR TETRA: Add 1 drop per 2 gallons daily. FOR MARINE FISH: Add 1 drop per gallon daily in a bare aquarium. Replace carbon 24 hours after last treatment. Maximum dosage: 3 daily treatments.