why would you want to add cuc to your refugium? Algae and the such is supposed to grown in there.
__________________ 180g- Mostly BIG fish and some coral. ~80g Nuvo- My coral tank with "happy fish"~ 90g- FOWLR Not the not happy type of fish~ 125g- Freshwater Malawi Cichlids ~10g- Nuvo- The refugees from the Ich of '18
Hair algae and Cyanobacteria do the same thing as macro algae you just can't control them lol. They're harnessed in things like algae turf scrubbers. You could add serpent or brittle stars just to eat stuff that gets in there.