Mine were a great help with an algae turf problem. But when they get large, they become a major pain, knocking things over and mine consumed tons of nori sheets, when food became scarce.
Also be very careful when handling them. I have done so safely for a year, until a few days ago. If interesed, you can read my urchin sting threads on RC,[ doc Rons forum ], or on www.thereeftank.com
Also be very careful when handling them. I have done so safely for a year, until a few days ago. If interesed, you can read my urchin sting threads on RC,[ doc Rons forum ], or on www.thereeftank.com