I'm having a lot of fun getting into aquascaping, my first track is 64L. I've been holding my breathe waiting for my first problems and I think I may have brown spot algae, see the photo and let me know if that's what you also think. Reading up on this it seems it isn't even a true algae. Anyone have any tips on how to manage it? Doing my 50% weekly water changes, but as a beginner have been using daily "liquid carbon" instead of CO2, which I will progress to hopefully soon. Thanks for your thoughts.