Urchins are NOT good at squeezing near corals...for sure. If you have open areas, then they will mow down in good numbers. I keep the glass spotless so that they have to stay on the rocks, otherwise they seem to like the glass.
I have had hit/miss success with dobatella sea hare - when they hit, they are amazing, but some of them just wither away in a few days.
Magnificent Rabbitfish have been good for me when I let them get hungry... they have crushed bryopsis to hair to bubble, to anything, really. The only downside with the magnificent is that they are not cheap, still probably only 50/50 and the get large very fast. If you don't mind the cost, I would try one out.
I have a group of lettuce sea slugs that breed in my tanks - I see babies every once in a while, but rarely see the adults. They are not large enough to do much damage, so skip these if you had an inkling.
I have NSW type parameters and I can have algae outgrow my corals without algae consumers. I am not willing to go Ultra Low (below NSW), so algae happens. I fight it in every new tank (just set one up) for about 6-7 months and the urchins and siphoning eventually gets it all, but it sure sucks for a while.
Good luck - I know that nobody takes solace in this, but it will pass in time.
I have had hit/miss success with dobatella sea hare - when they hit, they are amazing, but some of them just wither away in a few days.
Magnificent Rabbitfish have been good for me when I let them get hungry... they have crushed bryopsis to hair to bubble, to anything, really. The only downside with the magnificent is that they are not cheap, still probably only 50/50 and the get large very fast. If you don't mind the cost, I would try one out.
I have a group of lettuce sea slugs that breed in my tanks - I see babies every once in a while, but rarely see the adults. They are not large enough to do much damage, so skip these if you had an inkling.
I have NSW type parameters and I can have algae outgrow my corals without algae consumers. I am not willing to go Ultra Low (below NSW), so algae happens. I fight it in every new tank (just set one up) for about 6-7 months and the urchins and siphoning eventually gets it all, but it sure sucks for a while.
Good luck - I know that nobody takes solace in this, but it will pass in time.