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What is the brown stuff on my plant leaves?


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I have a 60 gal planted tank with a handful of fish (Denison Barbs, Congo Tetra and Gold Pleco).  Plants are Amazon Sword, Dwarf Sagitaria and three different Apontogetons.

All plants are growing fairly vigorously.  New leaves come in bright and green, but after a couple of weeks they start to accumulate some brown algae like stuff on the leaf surfaces.  I have struggled to definitively identify what it is, hence it source and fixes.

The inside tank glass also gets green spot algae, which I scrub off once a week.

Water parameters appear to be good.

Any tips and advice is welcome.


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