I just noticed this fuzzy stuff growing on my Lace Rock it is almost like fine hair. I brought the rock home and soaked it for two days in a bucket then took a wire brush and scrubbed it everywhere multiple times. I have a second piece of Lace Rock that seems clear it just has relentless moss growing on it no matter how much scrubbing I do. How should I treat the rock to avoid spreading whatever this is? So far it seems to be isolated to the rock. In the foreground of the photo it appears as a blur if you look past it you can see a patch of it more clearly. Thank you for your help!
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