I just went through a 4 week period where I lost a bunch of different species of mushrooms- they simply melted and shriveled away. Some of my rocks that were covered are now bone bare. My parameters were just fine- no major changes, no new lights, no big water changes (my routine 15% every other week). The only possible thing I can think of that has changes is that I started using Zeovit's Marine Snow as a water clarifying agent at the prescribed dose (1ml/25 gallons/day). Has anyone had a similar experience with or without the use of Marine Snow?