[Matt Nace]

Yes, it can take that long, even longer. Most people add filter media, or gravel from an established tank, to jump start the process.

Doing water changes can prolong it, but you have to with NitIte levels that high. Your fish could die from those levels.Anything above 3ppm is very bad.

I would do the water changes until the levels are reduced. DOnt feed your fish for 24 hours, and after that, feed very lightly. Only put a single small flake or 2 in, not letting any hit the bottom. When your danios get a few each. stop feeding. Once a day feedings.

Dont rinse your filter or any media. Leave that alone. Put your temp up to about 80 f.

Watch for disiese, and monitor the Ammonia, Nitite , and Nitrate levels daily. If the Nitite levels go above 3, you have to do a 25% water change. Use a water conditoner to remove ammonia, chlorine and chloramine to the new tap water.

Hope that helps, post back here with some updates.

0 Ammonia/0 Nitite/ any # of nitrates is cycled. Never , ever touch the bio wheel.It needs to establish.