My aquarium is infested; it's on the plant leaves/pebbles/glass.

I tried to remove everything manually but it soon bloomed again, big water changes, shortening the lighting time, but no success.

It used to have some guppies; now, only snails (Melanoides/Physidae) and a single Ancistrus in 60 liters.

And for plants, only a few Cryptocoryne wendtii.

  • 1
    It would be useful to know how big your tank is and what lives in it beside the algae :) Jun 1 at 13:01

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