"OIDIMOL" is a preparation effective against all kinds of external skin parasites, especially against dinoflagellate (small white rash of up to 0.1mm in size) - Amyloodinium pilularis. It patrially inhibits the creation of algae. It annihilates hydroids. Prior to application, removetake your ornamental Ampularia snails out of the tank. Finally renew a half of the water. Dosage: 5ml per 25 liters of aquarium water.