I had some of both in my small 6 gallon tank, and it was the worst mess I've ever had. The chaeto hosted a lot of pods and they both helped keep my pH stable, but they took over everything. It was ridiculous, even getting to the point that they grew over top of and killed a patch of zoanthids. I eventually took all the rock that it came on back and traded it. In my opinion, I would be weary about it in a nano, and definitely do not put it in the display part.