Establish and maintain a healthy environment that's safe for your fish with these Jungle Ick Clear Tabs. They are fast dissolving and work quickly to clear white spots that can be caused by sudden changes in temperature or stress. These Tetra tabs effectively remove ick that, if left untreated, can spread rapidly and become fatal for all of the fish in your tank. They also help to protect against secondary infections. These clear tablets are designed for use with tanks that have a 40-gallon or larger capacity. They make caring for your fish and your aquarium fast, easy and convenient. The package contains eight tablets. Directions: Add one tablet for every 10 US gallons (40L) of aquarium water. For tank volumes of 40 gallons or larger and for soft and/or acid water with low alkalinity, dissolve tablets before adding to tank. Use half strength for scale-less, weak, sensitive or small fish. There is no need to raise the water temperature. Remove carbon filter during use.