Too Much Coraline, what to do?

[whatcaneyedo]

You could probably fit a few more urchins into a 180gal. They're the only thing for sale that I know of that eats coraline algae... Tuxedos are good but I wouldn't bother with rock-boring as mine doesn't move around very much.

[marie]

I found the best thing to mow down my coralline algae is a long spined urchin. I had a tuxedo and while he did eat coralline he never made much of a dent in it

[lastlight]

I've always wondered how those things can even navigate a matured sps tank with all those spines?