API Test Tube Rack

This is a test tube rack that I printed for API test kits. I've included a 7-tube rack for if you have the saltwater master test kit and the reef master test kit, or just the standard 4-tube rack. This was designed for Nano tanks so it fits on 6mm glass. If you would like it to hang on thicker glass, please leave a comment.

Use this for filling and verifying the results on the capped tubes! Don't do the actual testing on the side of the aquarium!!