Draco I have read quite a bit on different corals, mushrooms and the like and it seems there are only a couple of articles that mention the water quality being to clean. We have a Xenia that has closed up tighter than tight and after reading one of the articles I decided to feed my corals more often and now after only a few days our little xenia is losening up and starting to show life again by streching out. Maybe that will help your mushrooms, we haave been feeding them phyto feed. Could try and see what happens