So my cycle seems to have stalled at high nitrates. Help please? :D

[Aquattro]

Originally Posted by Enigma

The same could be said, of course, for a bio-wheel filter.

Do they still make these? Yes, if you have one of these, sell it too. Any long term media that breeds aerobic bacteria will contribute to NO3 accumulation. Unless the media is cleaned weekly in fresh water, I don't think the benefits are worth the downside of NO3 buildup.