On Sun, 24 Mar 2019 00:45:06 -0500, you wrote:
The smallest of diaphragm air pumps would be more than sufficient. You should use an air valve the straight through part going to the bubbler, the variable partT to room air.Sent from my T-Mobile 4G LTE Device
Definitely you also want a one way valve in the air line. Keeps
etchant from getting out into the environment by syphoning when the
airline is disconnected.
Harvey
