So you decide to clean your support removal bath. Since you are cleaning the bath you also decide to clean and investigate the circulating impeller.
You BREAK said impeller and are now out of LUCK! Righty Tighty, Lefty Loosy unless it is a left handed... :-(
You have CAD and 3D printer.
You also decide the design of the impeller could be improved!
You design better impeller, print it and use it.
(NOTE: The impeller in the pictures is wrong. I had to change the direction of the impellers as the were incorrect.)