I've got this growing on most of my Anubuis leaves. I think it's BBA which is hard to deal with. My lights are listed in my sig and these plants get direct light. I have just started DIY CO2 (a whole new problem:icon_sad and still have plenty of Excel. I didn't put a pic of the tank just the worst leaves I clipped, but I've let this get away from me a little bit so defeating it may take some work.
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