Tried to search and didn't see anyone post this yet. If you have a local Ace Hardware these prices aren't too bad. Sale starts tomorrow, May 25th and goes thru the 28th.
The flyer for my area has the blue HTH Shock (45% available chlorine) for $1.99/lb. (Much cheaper than Wal-Mart that charges $3.47/lb. or 5 lb. box for $14.97 + tax. Still not as cheap as Aldi 96 oz bleach @ $.99 or 182 oz Great Value bleach at $2.98, but a decent price if you buy shock anyway. I stocked up last year as they didn't limit quantities.
I've got my eye on their Liquid Chlorine though. I just bough 2 cases (4 gallons) last night at Wal-Mart for $6.47 + tax.
During this sale Ace has it 4 gallons for $10 of 10%, which is still not as good as the Aldi bleach, but fewer bottles and more concentrated works best for me!
They also have algaecide for $5, not sure how big a container, but worth mentioning.
Love this forum!