Aquariums: How do i remove the shrimps from this setup ?

I added a few long arm shrimps and i had no idea they'd prey on my tetras. There are 10 of them but they are hidden so well i cannot even see more than 1 or 2 at a time. They dont come out to eat either if i try to bait them with some blanched zucchini or peas. They just stay hidden. How do i remove them from this tank now ? I cant think of any way other than removing my entire aquascape which would be a huge mess up on its own.