I think it's more of a preventative. I know of quite a few people who successfully run chlorine in their systems, though I believe most use HTH Pool Shock as opposed to liquid bleach.
And when I'm cleaning my system with bleach in between runs, I use a lot more than 8 drops per gallon.
I could never dial in a sterile rez. I find that using bacillus amyloliquefaciens to be the simplest, most effective thing. At least for me it is.