I used emerald crabs and they left no crumbs. Got mine from golden state corals in reseda but most fish stores should have them. Call in advance. I’d also note not to get the ones that are massive they can pick at corals.
I called several LFS including Ellis, and no one has them.
What is everyone experience with pitho crabs? Do they eat bubble algae? Or should I go for Emerald? I’m weary of Emeralds getting big and start messing with other things.
Every single emerald I have ever gotten stopped earing bubble algae shortly after introducing to my tank. They just became scavengers or would start eating corals. I'll probably avoid them from now on.
For pithos, they have never bothered my corals except for knocking sand bed corals over. But I've only had a few that really went for the bubble algae--the others became scavengers for TDO pellets or other food that fell to the sand bed.