The concept development of a (small), modular Sludge Removal Unit (SRU) that can be incorporated into our electrical robot design. To successfully remove sludge, like salt sediments and densely packed semi solids, there are a number of procedures and methods that can be considered, we are basically looking at dredging with an agitator tool, to loosen the sludge and make it available for removal, through suction. Simply trying the remove sludge with a suction hose, will not be very efficient.