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Looks like a bit of hair algae.no the algae on the bottom of the frag.
The greenish hairy thing there
+1 GHALooks like a bit of hair algae.
is this bad?+1 GHA
Not really - it's more unsightly than anything else (particularly if you have a lot of it). You can probably scrub it off with a toothbrush or move a snail over to work on it.is this bad?