It sounds like you have a product designed for fishless cycling in aquariums, which is a method used to establish beneficial bacteria in the tank before introducing fish. Using ammonium chloride provides a source of ammonia for these bacteria to thrive on, mimicking the waste produced by fish.

Key Points:

• Concentration: The product contains 40 mg/ml of total ammonia-nitrogen (TAN), which is the form of ammonia that benefits the nitrifying bacteria during cycling.

• Dosage:

  • The recommended dosage is 4 drops per gallon of aquarium water.
  • This should be done three times throughout the cycling process.

Cycling Capacity:

• 2 oz. (60 ml) bottle: Cycles up to 100 gallons (359 liters).
• 4 oz. (120 ml) bottle: Cycles up to 200 gallons (757 liters).
• 8 oz. (480 ml) bottle: Cycles up to 400 gallons (1,514 liters).

Recommendations:

• It’s beneficial to download and follow the recipe for successful fishless cycling as it will guide you through the steps and help ensure a healthy environment for your future fish.

If you have other questions about fishless cycling, how to use the ammonium chloride, or any other related topics, feel free to ask!