Aquarium rim brackets

An improvement over my first [equipment holder](https://www.thingiverse.com/thing:2512549), these brackets slip snugly over the edge of a 29g Aqueon tank rim. One holds a float switch and aquarium airline for an automatic topoff, the other holds a Neptune Apex temperature probe.

[OpenSCAD source on Github](https://github.com/csammis/3DPrinting)