Need Recommendations: Unwanted Aptaisa in sump/refuge

[Beccadawn]

Tagging along, I have the same problem..... but they've managed to get into the sump & the 2nd refugium/seahorse display tank on the same level. I have a feeling I helped with that though by moving rocks around, but none thus far in the main display tank. So far only little tiny ones all over the glass.