10-15 gallon Refugium Inverts?

[CaptainKiwi]

I am planning to have quite a large refugium of around 10-15 gallon and was wondering what interesting inverts I could put in there that wont disrupt the copepods and other microfauna that the refugium is made for. There will be a lot of invert eaters in the display tank so it would be really cool to have a safe space for them.

 

[TX_REEF]

I think porcelain and calico crabs are pretty cool inverts that generally don't do well in display tanks!