KaliKooler (50mm fan adapter for Juwel Rekord 800 aquariums)

thingiverse

This was created for Kali, who is 15+ years old, happy in her safe domain, but lives in an aquarium prone to overheating on Amsterdam's occasional 25+c days. It allows a 50mm 12v fan to be mounted on the feeding hatch hole of a Juwel Rekord 800 (100l) aquarium. Use a normal 50mm 5/10/12/24v PC fan, Don't be a dick and use a high voltage or pressure fan. The fan is mounted on a velocity stack sourced from here: https://www.thingiverse.com/thing:441251 - I simply scaled the provided STL by 125% and it worked fine, ymmv, that design also has a scad+dxf to play with. - I then glued it all together, there is a 12v wall-wart adapter in the tanks power bar that runs this. - It is quietest without any sort of intake guard, but this tank is on public display so I added a simple guard and we ignore the slight whine, or attribute it to tourists. This design might well fit other similar/clone aquariums, fits in a 136x120 gap, with a 114x54 food hole offset 17mm towards the front. The scad file parameterizes these values if you want to adapt for other models, it uses a fancy font for the text which you can either drop (to the default font, or entirely) or look at the comments to install the font I used, or any font from the same source you fancy.