- Reaction score
- More than 10 years
I am two weeks into a fishles cycle where I used an established sponge filter to jump start the cycle in a new 55. I am running 2 aquaclear 70's, plus the sponge. I add ammonia to 2PPM, and 48 hours later I am at 0, Nitrites ate ALSO at 0 at both 24 and 48 hours??? Nitrates are 60 PPM as expected. Why is ammonia cycling slower than nitrites? I had a nitrite spike at week 1, dark purple on the API, then it dropped, but the ammonia is still not dropping in 24 hours. This is my first fishless cycle, and I am so happy to not have fish involved, but I am confused by nitrites being ahead of the ammonia. Is this because I introduced established filter media?