Air powered aquarium sponge filter

thingiverse

This is my take on an air powered sponge filter using filters with a 2 cm through hole that I purchased on Amazon. The components are designed with minimal clearance to ensure a snug fit and will require some sanding. You can either pass air tubing through the hole in the sponge top, then attach a stone further down in the filter or you can pass the tube from the air stone through the sponge top and attach the tubing there. The sand base screws on with an M6 10mm hex head screw. You might be able to find suction cups that will slide into the bolt hole too. If you use screws, consider stainless steel for added durability. If you want to add a filter on the same air stone, you can utilize the dual holder. When using the dual holder, you can push the sponge base's open end into the table about 15 mm and shorten the print before the screw section. This will reduce the overall width of the setup. I'm not certain how long an exhaust tube is needed but I'm guessing longer tubes move more water. The exhaust tube outer diameter is 30mm in case you want to create a longer one. When printing, I used manual supports on the sponge base and sponge top placing them well away from the walls as Simplify3D was inserting supports in the wall and ruining the parts. All parts were printed as oriented in the upload.