My nitrates hover between 20-40..
I havent had any problems with mushrooms, the xenia and frogspawn yet. Actually, like most people my xenia is spreading rapidly. I think the difference is I dont have any hard corals, they are much touchier. But,,, I could be the only one
I dont overfeed and granted I do a 30 gallon water change 2x a month (or atleast try to) I think of my tank as a normal aggressive tank, with the normal aggressive readings.