Zaedon
Aquarium Advice Activist
You just have a larger bio load than your current colony of beneficial bacteria can consume, they will multiply to equal the supply of food, just give it a bit of time
This is not unusual if you use some sort of quick start additive. It seems to slow the process or completely stop it. I have tried with and with out quick start products and the results seem to be the same every time. The non-quick start tank takes a few weeks to a month while the quick start never seems to cycle as lng as I keep adding the quickstart supplement. After stopping use of the quick start additive you will usually see changes within a week or two.