Quickly clears cloudy aquarium water, eliminating clouds caused by dirt, algae, or bacterial bloom. Clumps together tiny floating particles, forming large debris that will be removed by aquarium filter. Safe for all fish and plants. Treats 370 gallons of water. Directions for Use: 1. Add two drops of Accu-Clear for each gallon of aquarium water. For larger aquariums, add one teaspoonful for every 50 gallons of aquarium water. 2. Water will clear within several hours. If second dose is necessary, wait 24 hours. Accu-Clear can be used weekly to keep filters performing at maximum efficiency. For freshwater aquarium use only. Keep out of the reach of children.