Candy cane pistol shrimp in overflow

[Durtle]

I've had a fluvial evo 13.5 up and running for a few months and everything I've added seems to be happy enough. A couple weeks ago I added a candy cane pistol shrimp and yellow watchman goby to the tank. They haven't found each other yet but settled in well. I have a media basket in chamber 1 and recently I find the pistol shrimp in the filter floss every morning. When placed back into the display it goes back to digging for the day and overnight finds it way back into the filter floss. Has anyone else experienced this? Is there anything I can do to prevent this?

 

[gastone]

Assuming he's getting through the weir, you can get an overflow cover that has smaller holes that he wouldn't be able to get through. If you have access to a 3D printer, there are plenty of downloadable options if you don't want to design your own. Otherwise, I usually default to Etsy.

https://www.etsy.com/listing/907409754/overflow-covers-for-aquarium-filter?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=overflow+cover+fluval+13.5&ref=sr_gallery-1-2&bes=1&sts=1&content_source=fc019c9d8c6d24745bffa49f2e7af5fee311734e%253A907409754&search_preloaded_img=1&organic_search_click=1&variation1=2275879022