If you don't want the noise associated with an air cooling pump, there is an alternative that combines the benefits of an air pump without the noise, called the tusk air cooling. @mhackney has created good information on this: https://www.thingiverse.com/thing:2445660 http://www.sublimelayers.com/2017/03/the-tusk-fan-shroud.html
I'm running a brushless air pump I sourced on aliexpress that came with silencer mufflers, as the the 'berd-air' pumps are brushed motors.
A disadvantage with both the brushed and brushless motors, is they get extremely hot, hot enough to where you can't even touch the motor for more than a second.