The usual way to agitate PCB etching today is to put an aquarium bubbler at the bottom of the tank.[1] Cheap, compact, simple, and you need less etching solutio

The usual way to agitate PCB etching today is to put an aquarium bubbler at the bottom of the tank.[1] Cheap, compact, simple, and you need less etching solution. [1] https://www.circuitspecialists.com/et20 https://www.circuitspecialists.com/et20