Been utilizing bacterae to prep a tank for shrimp, what is that this? A fungus?

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  1. I can’t quite see in the pictures but if you’re talking about a white fuzzy film on the wood it’s just biofilm

  2. White fuzz on or near new wood is white mould. Harmless to beneficial. Food for many. Goes away in a few weeks once your filter becomes cycled to the new fungus.

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