Aquarium Snail Shovel configurable

thingiverse

Here a configurable version of a snail shovel - could also be used as a base for cat litter or similar. I created this originally in FreeCAD - this is now an OpenSCAD reproduction so you can modify the parameters and adapt easily to your needs. I use it as a shovel to filter out snails from my aquarium floor: snails stay in, gravel passes through. Works of course only if the ground material is smaller than the snails you want to catch.