I would think that would work. I tend to like putting a sponge prefilter on my intake tubes, just to cut down on the amount of dirt/grit/etc. going through the impeller, and also to keep little critters out.
I was in a Petsmart recently, and found a Fluval Edge prefilter that was pretty inexpensive, and the center hole doesn't go the entire way through the sponge.
Congrats on the shrimp.
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