Vacuum Pump - 12V

I've tried using an aquarium pump with an aeration stone--a stainless steel food grade stone has a wetting pressure of at least 3 psi. An aquarium pump is going to be challenged to push air through it, if at all. I know they sell them with the aquarium pump, but they really don't work. I use a diaphragm pump from a sphygmomanometer: https://www.amazon.com/dp/B078H8V563 I bought a plastic battery holder, and use AA batteries to run it. Just taped it all together. This little pump will make 10 psi, which is plenty to overcome any wetting pressure you'll run into. I also bought one of these, (and it's the one I mainly use), but unfortunately the seller doesn't have it anymore: https://www.amazon.com/dp/B00DYA21PU