Isn’t there a granulated chlorine product that is used for swimming pools that is just as effective as bleach, and lasts a lot longer?? “Hyperchlorate” or “Hyperchloride” both come to mind, but I am not certain which one is correct to use....
That’s what is being discussed in the article, Calcium Hypochlorite which you can easily find as “pool shock” at your pool-supplier store or Walmart, just make sure what you get hasn’t had an algaecide added to it.