This is a filter holder designed to hold the Juwel BioFlow One filter. I made it because within a year the 4 suction cups of the filter will become hard and won't hold the filter to the glass anymore.
You can slide this holder around the filter and then clip it to the glass so it will be held into position again without needing the suction cups. You do need to leave the suction cups mounted; the holder will be kept in place between the suction cups. The holder is easy to remove when you are cleaning the filter.
The print is easy, but be sure your build plate is large enough. It is best printed laying down on it's side. The original source file and a dxf export are included if you want to modify this holder.