brown algae

  1. Jack Reilly

    What's this algae and how can I obliterate it

    All of my anubias (except new growth) and most of my other plants such as s repens have this brown stuff all over the leaves. If I rub the leaves with my fingers it does come off but not easily, which makes me think it's not just aquascaping dust but an algae. What is it?
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