My crayfish kept eating the sponge filter on the water inlet for the aquarium so I designed this grill to fit over the sponge filter. This part should be printed with PETG as it does not deteriorate underwater.

This is the filter https://www.amazon.com/gp/product/B0C1G5DC35

I'm using a Pennplax Cascade 700 cannister filter but this should work with any larger pumps for 20 gallon and up tanks