You’re super lucky to have those guys. I’m looking everywhere online, from what I see in forums they’re super hard to find.I don't know if bumble bee snails work. I've only ever added one, since they can predate on regular snails. They also eat the little sand tube worms and maybe fan worms, so the one I have is relegated to the frag tank because I'd cry if it ate my Christmas tree worms. I have those little slugs though and would be more than happy to send some your way.
I totally agree bumble bee snails are risky, but it’s getting crazy in my tank.
I looked up Christmas tree worms and those look awesome!!
I’ll definitely take you up on the slugs. I can’t find them anywhere.