no, algae killing is not easy. It took e about 4 days, and unknown amounts of bleach, monitoring the FC, and TC every 30 minutes or so, backwashing, backwashing, backwashing and more backwashing.
I decided to wait and see if the filter bags/pump do it quick enough, too cold to swim now anyway!
I also swiped the new filter bag off DH's new saw....a miter saw, and it works as well, if not better than the filter bag for pools. Yeah, he isn't going to be happy, but oh well.