MiniBow/BettaBow 2.5 40mm Evaporative Cooler
thingiverse
As we move into warmer temperatures and higher humidity's, I have found my MiniBow/BettaBow 2.5 gallon tank creeping up into dangerous temperatures... First, I had a rPi fan hat jerry-rigged over top of the feeding hole and found this worked well. So, I decided to design something a little more permanent. I use a 40mm Noctua 5v PWM fan and 4 M3 bolts/nuts. You can use whichever fan you like. Make sure that the bolts aren't too long. I have been using this now for a while and believe it makes enough of a difference to publish. Tip: print with the fan mount flat against the bed.
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