(Just for background)
I am the guy who services our pool and my wife handles the chemicals. This year we have opened the pool for the first time, busted a hole in the pool, reinstalled the liner and refilled the pool, had a leak in the skimmer, fixed the leak, and now have a leak in our pump. Needless to say, we have done through quite a bit of water and we are still leaking it slowly. Thus, we've used up almost all of our CYA tests and have had to add a ton of chlorine over this season.
Now to the question:
My wife has decided she just can't justify the expense of doing the liquid bleach method suggested here. We have both tried to make it work but she says it can't be as cost effective as throwing in a puck every 3 days like our neighbors.
Sell me on why she is wrong. (Though any husband will know this is a dangerous question)