Hi! I'm a little bit of a newbie, so please help me out here. I have a 20 gallon tank that is currently empty except for a java fern, an anubias (marble queen I think?), a marimo, and some java moss. The tank has been set up for just about a month now, and is completely cycled (I jumpstarted it w/media from an established tank). It isn't heated, because it's for an axolotl I'm getting in a couple of weeks. Params are 0/0/5. I'm using Flourish and Excel to give the plants a little boost before I have to cut the light down a whole bunch when I get the axolotl. Does anyone have any idea what this grey fluff might be? The only thing I've seen about grey fluff is fungus from excess food, but since I'm not feeding anything in there, could it be something else? It's not very pretty, and it gathers in large pools, for lack of a better word, especially on the leaves of my anubias. It isn't attached at all, and just floats away when I agitate the water around it. Thanks!