Overview

This is a simple dosing tube holder that just uses friction to hold dosing tubes from this Chihiros Dosing Pump System:
https://www.chihirosaquaticstudio.com/products/chihiros-dosing-pump-system

I had issues with the original dosing tube holder being a bit too flimsy, and clogging really quick with condensation. It's flat underside also tended to wick any small splashes of water back towards the back of my glass, eventually running down my tank wall and onto my stand.

This dosing tube holder is designed for 6mm glass currently, and simply sits on top of the tank rim with the tubes pushed through the bottom and top of the unit to hold in place securely. The slots are designed to specifically fit the 2mm/4mm tubing that this pump system uses. I currently use a 3 tube version for mine as I only dose Macros, Micros, and RO water to top off, however I included a 4 tube version as well for those utilizing the full system.

Printing

This can be printed in any material, however I recommend printing with at least 4 bottom layers, and 4 perimeters to ensure it's more watertight just in case.

This model is designed to be printed on it's side, and requires no supports to print successfully.

Included Files

I've included both model files for the 3-slot and 4-slot holders, as well as the step file for anyone wishing to remix this. If you aren't comfortable modeling and would like me to release further revisions with adjusted measurements etc., please let me know!