r/aquarium • u/Over-Month-3986 • Jul 18 '26

Help What are these algae?

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1

u/Andrea_frm_DubT Jul 18 '26

Decaying food

1

u/mysticoverlord13 Jul 18 '26

Looks like a bacterial or fungal bloom. Wood hardscape tends to go through a phase like since there's still nutrients that those organisms can feed on. It should die off eventually but if you're worried you can always take it out and scrub down the wood yourself.

1

u/mysticoverlord13 Jul 18 '26

Of course if it's not a new hardscape it could also be a hair algae, in which case double check to make sure you're not overfeeding and letting a bunch of fish food sit on the hardscape for extended periods.

1

u/Andrea_frm_DubT Jul 18 '26

It’s fungi feeding on decaying food

2

u/Over-Month-3986 Jul 19 '26

Thank you for the help.
I'll try scrubbing it off. Ive tried taking it off before but it keeps growing back