ProVap Oxalic Acid Vaporizer
While vaporizing one colony, you can prepare the dosage for the next, so 4 colonies can be treated in around 80 seconds. This is a fast and economical unit.
There is no guessing about how much acid enters your colony, as can be the case with some other commercial units. This unit has no air compressor or long hoses / tubing.
Power can come from a small generator or an inverter connected to a vehicle battery.
See also this video.