Have you checked into converting to the salt system? It's well worth the cost!! I'd bet you'd recoup your cost in a couple of years. It's so easy to maintain, too!!
Actually, the cheapest place around here has such cheap quality stuff that we avoid them. We go to a place that happens to be closer, but more importantly has high quality chemicals.
Thanks for the advice about the salt system. Will look into it-wasn't sure it could be used with above ground pool.
As for the advice to shop locally-sometimes that is not possible. I live in a very small town and the closest pool supply place ( a large chain) is about 30 minutes away. I do support local businesses whenever possible but my options are limited.