Yeah, I use the 5 gallon carboys. I get them from a pool store that uses the square ones, not the round ones. I paid $6 each for the carboys about 5 or 6 years ago and now just pay for the refills at about $17/per. Since this store's stuff consistently tests at 14%, I figure I'd have to get 6% bleach for less than $1.45/gallon to match the LC price, and it would STILL be more than twice the volume and use lots of jugs. I don't think of it as "buying" the carboy but as a deposit.

The spigot runs about $4 but is worth its weight in gold. Another GREAT pool gadget is a special pliers by Channelock called Oil Filter/PVC pliers--they could have been SPECIALLY designed for pool owners, they are so perfect! They crack open and tighten quick-connects and ball valves, and they are the PERFECT tool for attaching the spigot.

I have two pairs and they are FAR superior to any other kind of pump pliers.

Carl