Harry Chickpea writes:

NO!!! It DOESN'T take power. It doesn't take a lot of power to clean
the debris that falls to the bottom of a pool, and that is where most
of the stuff ends up if you use a shock with a coagulant.

You're already depending on power in the circulation pump. Might as well
apply a fraction of that to make the most effective cleaner. A Polaris
180/280/380 is like a robot shop vac, versus a wimply little Roomba and its
precious "cleaning".

No fair depending on chemicals. You're just substituting chemical power
for mechanical power, the former being generally much more expensive per
unit of cleaning.