A way around the addition of peroxide is the use of shoveling, which would be rather inefficient using single microswimmers. For this, we introduced catalytic chains of magnetic assemblies that form spontaneously when a magnetic field is applied to these magnetic particles. These chains move as a collective and form kind of a barrier that displaces all microscale obstacles that come into their way. Employing this strategy, we were able to remove the extracted microplastics and random suspended matter from Warnow River, achieving about 67% of clearage efficiency in pure water. Also this effect is very robust and material independent. A faster elimination can be achieved by adding a low percentage of peroxide, but the same sample can also be used in pure water and still achieves a very good output.