With most aquariums, you need a filter to remove muck, and also to extract toxins from the water. I used to make filters out of PVC tubing, but i decided to design a filter that would be fully 3D printable, and modular. I may create a separated project for it later, but here's a video explaining it :

Compared to other DiY filters, this one takes longer to physically create, since you have to wait for the printing. However the printer works alone :)

Assembly is fast (a few minutes), and the filter can be altered, expanded, modified, etc...

If you want it larger, simply print more chambers and install them!

See you next!