Ammonium Chloride Solution for Fishless Cycling
Use with One & Only Nitrifying Bacteria
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 t
| Product Specification | Value |
|---|---|
| Chemical Name | Ammonium Chloride |
| Concentration | 40 mg/ml of total ammonia-nitrogen (TAN) |
| Recommended Dose | 4 drops per gallon of water |
| Typical Use | Fishless cycling in aquariums |
| Compatibility | Use only with One & Only Nitrifying Bacteria |
FAQ
How much ammonium chloride should I add per gallon of water?
Add 4 drops per gallon of aquarium water.
Can I use this solution with other types of bacteria?
No, this solution must be used with One & Only Nitrifying Bacteria.
How many gallons can a 2-ounce bottle cycle?
A 2-ounce (60 ml) bottle will cycle 100 gallons (359 liters).



Samantha Russell –
I used this solution for my first fishless cycle and it worked smoothly. The instructions were clear and the ammonia level rose steadily. My tank cycled successfully within 2 weeks. I followed the recommended dosage exactly and it made the process much easier.
Adam Mitchell –
The solution is easy to measure and the concentration is consistent. I used it with the recommended bacteria and saw good nitrifying bacteria growth. It took a bit longer than expected, but the results were reliable.
Jacob Skinner –
This product is exactly what I needed for setting up a new tank. The 4-drop-per-gallon dosage is simple to follow. I completed my cycle in about 14 days with no issues. Highly recommend for beginners.