Cost of raising FC by 1 ppm

[KurtV]

So why are we all buying bleach when the pool store chlorine is cheaper?

1. It's not available in all locales.
2. Many people don't have a pool store located conveniently close while almost everyone has easy access to a grocery store and visits one at least weekly.
3. Relatedly, you don't have to make another trip to another store to get bleach; you can just pick it up while you're at the grocery or Wal-Mart or wherever.
3. The 12.5% stuff, because most people won't use a whole container at once, whether it's stored in carboys or jugs, requires more handling with a greater potential for spills and splashes that will damage clothing and other things.
4. The stronger stuff degrades more quickly.