I want to introduce you to such a mini-pump. On the seller’s page it is positioned as “Aquarium Pump”. But I, for example, used it to supply water in a makeshift evaporative air cooler. The voltage range specified in the specifications is 2.5-6 V DC. If you feed it with a voltage of 5 volts, then the fountain hits about 6-10 centimeters in height. (This is with a dropper attached to the outlet fitting. But, since the impeller supplies water and the pressure is weak, it can be reduced simply by “squeezing” the outlet.
On the same tube from a dropper, he is able to raise water by about a meter.
It works almost silently.
It can be installed on the bottom of the tank both horizontally and vertically. To do this, there are corresponding protrusions on the body.
I think it can be useful to the "masters" if the need arises precisely in a weak supply of fluid. (For example, to wet something, or to automate the watering of indoor plants).
Cost: ~ 82