I'm not familiar with your set-up but what about a goby? I have a watchman goby and she's a real *****. Doubt she'd let someone attempt to take her out.
We've added sand sifting snails as well as an emerald crab to our set-up which we really enjoy. Maybe they'd be killer safe?
Well, right now I'm trying to focus on my main tank. It'll be 125 gallons at least, probably a lot bigger, and I think I will have a refugium so I can keep "Killer" and maybe help out my main tank at the same time.
