If you want to destroy everything in that well including the well itself, go ahead.
I have seen what pellet droppers do to wells after a few short years.
Had a local water treatment dealer talk a customer of mine into sending O-Zone down to the bottom of a 4" well which I had recently put a 5hp submersible in. Less than a year later, there wasn't enough left of the pump to save.
Do your cleaning upstairs, not in the well.