Image-Filter on Sentinel-2 images

i’m trying to improve my classification by adding some filtered-images with the original ones (Sobel, Mean, etc), so now i have a questions: does it make sense to perform such filtering on all 13 bands or this too much? Do you have any suggested filter?

Plus i have another problem, i’m trying to use graph to automatize the filtering for whole bands eventually, but the final product has some bands that i don’t understand and also seem like a duplicate of final filtered ones.
They have a tmp suffix as they are temporal, and if i do the filtering with all bands to avoid confusion with the big amount of final bands i’m wondering if there’s a way to avoid those.

Thanks in advance.