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Has any ever seen anything like this? Somehow, spores or bits of fibers from the moss ball started growing all over my prefilter. My shrimp love it as you can see. At least that is what I think it is. Has anyone seen this before?
 

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Black beard loves to grow on sponge filters apparently... I think one thing that helps is shading the light right above the sponge filter, as the algae needs light to prosper, in addition to the organics from the filter.
 
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