Quote:
Originally Posted by The_Desacrator
I have brown algae all over the rocks in my tank. how do i get it off safely without hurting my fish. tank is stable been up for many years.
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If they are easily removable, take them out and scrub with an old toothbrush.
If they are not easily removable, leave them in and scrub with an old toothbrush.
If it is very thick algae/cyanobacteria, turn off all flow in the tank, lightly apply 3% H2O2 over the rock surface with a syringe, leave for 10 minutes, turn flow back on, wait a day and remove dead matter.
Turn rock so algae is facing down.
But some snails/shrimp/oto catfish to help combat future growth.