Ace also has Transchem brand and it's $9.99 to $11.99 area depending.
Hornungs True value says you need to buy 4 of them at $9.99 but the other area Ace Hardwares might not. This is the first time I've seen that. A case is a lifetime supply for most folks without the pool.
Ace is my go to, $10 to $12 for full strength depending on location. The home center have the weak stuff by me for $13 and the paint stores have full strength for $27
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!