clumps here, there, everywhere... already took the affected rocks out for scrub, but after a week or two slowly they algae grows back...
but i only installed the FR (well actually canister modded to an FR) a few days back.. so waiting for results if any..
I only have an algae blenny which never touches the algae, hermits which ignore it totally, and snails which chow down only on algae growing on the glass...
So the only natural predator the algae has is my toothbrush right now... shucks