This bottle of reagent grade ammonium chloride is for use when fishless cycling. Concentration is 40 mg/ml of total ammonia-nitrogen (TAN). Dose 4 drops per gallon of aquarium water.* Use with One and Only Nitrifying Bacteria.

Generally during a fishless cycle you need to add ammonium chloride to your tank 3 times so:

• a 2 ounce (60 ml) bottle will cycle 100 gallons (359 liters)
• a 4 ounce (120 ml) bottle will cycle 200 gallons (757 liters)
• a 8 ounce (480 ml) bottle will cycle 400 gallons (1,514 liters)

We strongly recommend downloading and following our recipe for successful fishless cycling:

• 100 drops = 5 ml = 1 teaspoon
• 300 drops = 15 ml = 1 tablespoon