Oh - sorry - YMMV = "Your mileage may vary" -> maybe not all opinions of urchins are like mine, I don't know. They seem to be raspers of hard surfaces. Not a silver bullet for algae control but they definitely help just the same as other herbivores. They seem to be available from time to time.
__________________
-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
|