I bought a used Fluval Chi 5 gallon fish tank on craigslist. Was missing the arm that houses a magnet... took me about a year to figure out the light was in fact not broken! This is a not-so-pretty-but-fully-functional replacement arm that has a 2.5mm hole in it for a rare earth magnet to turn on the light. Works great for me.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.