Dennerle Nano Gravel Cleaner Filter

A filter for the pipe of a Dennerle nano gravel cleaner, that prevents for example shrimplets from being sucked in. It uses a stainless fine mesh as the filter medium.

The Dennerle nano gravel cleaner pipe is ~16,3mm in diameter and this filter is just pressed on the end when needed.

I've made two version:
-A short version, “outer_shell” (green in the photos)
-A longer version that has a funnel shape at the end, “outer_shell_funnel”.

The shorter is made for open areas of gravel, and the longer funnel shaped one is for putting over carpeting plants (so to not crush the plants and/or animals hiding underneath).

Printing and assembly:

-I used the stainless fine mesh from a clamp tea infuser since I couldn't find any similar mesh seperately.
So I just bought the cheapest one from amazon and tore it apart.

-For shaping the stainless mesh, just print both “shaper” parts. With these you just center the mesh on top of the form and wiggle the plunger into it. After it is pressed all the way down just pull the plunger out and remove the mesh (you might want to wear gloves to get a better grip and protect you from the stainless mesh strands that might prick you).

-After that, trim off any excess (length and double folds if you got any). 
The shaped mesh shouldn't stick up above the “inner_shell”. So trim off enough to leave a millimeter or two from the top edge.

-Now, the inner_shell is tapered. So make sure the narrow end is facing downwards.
Put the inner_shell inside the mesh that we just shaped.

-Finally, put the mesh with the inner_shell into the outer_shell and push it in flush.

That's basically it.
To make sure all parts stay together you can add some thin superglue at the top edges and let it wick down between all the parts. (Superglue is safe for aquariums. As long as it is cyanoacrylate).