Which Urchin should i have?
 

I am bringing in pencil, pin cushion, short spin urchins with my next shipment.
My questions is which one should I put in my sea horse tank?
Is one better than others for cleaning?
Just looking for personal experiences from people about urchins.
I don't have any corals that I am worried about in this tank so them knocking anything over isn't a concern...
I am thinking the Pencil simply because they can't stick the seahorses with their spines.
Any suggestions?

Bit off topic, but tuxedo urchins are what I have used in the past because they look great, and don't eat away all the coralline on your rocks.

I wouldn't put any kind of urchin in with SHs. JMHO, though.