This is a complete 3D printed small parts set for a DIY bio filter. You will also need a Danner Mag drive pump 300-500 GPH, some PVC fittings, some nuts and bolts, a trash can, gasket material and some filter media. I recommend using real filter media and not the shotgun wadding show in the pictures. Most of these parts have been uploaded but this is just a convenient set with pictures. Included in the printed parts is a .5 inch screen for the pump out flow. This will replace the PVC with holes that is in the picture (inside the trashcan where the pump sends water). It does not require supports to print when properly oriented. Also included are a few optional parts such as a smaller two part screen and a slip to thread adapter. You can use the two part 4x4 1.5” screen for both the drain and filter outflow instead of the small round one shown in the pictures as the drain screen. I also recommend silicone-ing the last elbow before it goes into the trash can. That way if you ever have to take the pump off you can just redo the silicone and clip it back into its mount. This is an improved filter design on an older design that had the pump inside the trashcan under the filter media. With the pump being external it’s much easier to get going if the pump ever seizes. These magnetic driven pumps are extremely efficient but require a small burst of energy to get spinning and will regularly require a light tap to assist it in starting. Assembly is pretty straight forward and is show in the pictures. If you have any problems feel free to leave a comment and I’ll try to help. Pump: http://www.amazon.com/Danner-02525-Pond-Pump-18-Foot/dp/B0002564LW/ref=sr_1_2?ie=UTF8&qid=1441477093&sr=8-2&keywords=danner+pump Gasket material: http://www.amazon.com/Neoprene-Sheet-Gasket-Black-Thick/dp/B0075ZMFME/ref=sr_1_3?ie=UTF8&qid=1441477126&sr=8-3&keywords=neoprene+sheet Filter media: http://www.amazon.com/Aquaponics-Aquaculture-Hydroponics-Garden-Supply/dp/B00UPSAL7Y/ref=sr_1_13?ie=UTF8&qid=1441477197&sr=8-13&keywords=filter+media Any Trashcan will Work Get nuts and bolts that fit the pump mounting bracket You can find all these parts at other locations for cheaper. These are just examples.