Sunday #aquarium cleaning.
This one has developed serious "hair algae" problems. Well established with good water params. No measurable ammonium or nitrite. No measurable nitrate unless I put some in. Light population of fish. A few snails. 80F. About 25% of the surface covered by healthy duckweed.
It will grow a very dense population of stringy hair algae within a couple of weeks. Like 2kg drained but wet algae. Zero slime algae or cyano tho.
No idea how to reduce it.
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