Reis2 Posted November 19, 2023 Share Posted November 19, 2023 This has been growing in the substrate of one of my tanks for a little while now. Fish seem unbothered and I recently gravel vacced so I probably disturbed it a bit. Any thoughts on what this is and whether I need to treat anything? Link to comment Share on other sites More sharing options...
JoeQ Posted November 19, 2023 Share Posted November 19, 2023 How long has the tank been running for? Link to comment Share on other sites More sharing options...
Reis2 Posted November 19, 2023 Author Share Posted November 19, 2023 Tank has been running for over a year Link to comment Share on other sites More sharing options...
JoeQ Posted November 19, 2023 Share Posted November 19, 2023 To me it looks like an immature eco system, particularly the awkward teenage years. But instead of Zits you get unsightly brown algae! Link to comment Share on other sites More sharing options...
Tanked Posted November 20, 2023 Share Posted November 20, 2023 Are you using a fertilizer? I can't tell if the spots are on the leaves, or part of the leaves. The spots + the green/yellow leaf colors would seem to indicate a nutrient deficiency. Link to comment Share on other sites More sharing options...
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