I have been vacuming on filter for the same reason that you mentioned above (wastes too much water).
Sean, from reading the link that you attached, I can use bleach instead of the overpriced pucks at the pool store??
Not Sean, but YES! bleach is simply another form of chlorine!
Will it not discolor the liner?
It will not! Bleach is actually a less concentrated (5.75 or 6%) form of liquid chlorine commonly sold at pool stores (which is usually 12%) Ok, if you pour it in one place with the pump off, yes, but so will pucks or or dichlor
Do I need to brush the pool after adding the bleach?
Nope! just add the bleach slowly in front of a return with your pump running, of course, and let the pump run for a while to circulate. If you need to brush anyway, it will just help distribute the Cl faster!
Great forum, by the way. I have learned more in the past day than I have in the past month trying to figure this stuff out on my own.