[bluenassarius]

dgasmd,

this local LFS always puts urchin's in the tank where they keep their macro algae. i have no idea why they do this bc the urchin finishes the majority of the algae within a week or so. after it's done w/ the macro algae buffet ... there is a little left on the rocks. this urchin is munching down several types of macro algae so it's definitely worth giving it a shot to clean up that tank.
please keep us updated on your results in removing this algae. this cotton algae doesn't look like it uses roots to anchor itself into the rock. there would be difficulty in removing it if it has already set its roots into the rock.