Just wondering.... After your tank has cycled, how long does the nitrogen cycle take to process from ammonia <nitrites <nitrates ? I've been using household ammonia to cycle my aquarium. It's Goldex Brand which I believe is only 5% My tank holds 46 gal. Not sure how much water it actually holds now that 50lbs of rock and 50lbs of sand are in it but I've got it figured out that 12ml of the ammonia raises the water to 4ppm Ammonia. Today when I ran tests (24 hrs after dosing with ammonia) it appears cycled. 0 ppm ammo 0 ppm trites through the rough trates. Anyhow, after I tested I added my 12ml ammo to bring it back up to 4ppm ammo again to see if it was actually cycled. 3 and a half hours later just outta curiosity I tested again and it's already down to 1 ppm ammo and still 0 nitrites. Really it's that fast? After all this time once it's cycled it just gobbles everything up almost instantaneously?