I shop at http://www.thatpetplace.com for everything.
They are about an hour away but the savings we get are great. Their online store is excellent, as well. They sell supplies for just about every animal under the sun. They always seem to be having a sale and you can sign up with their site to get current sales sent to your email. Most of the sales are in-store and website combined. I save around $300 a year buying from them and that's just aquatic supply savings. They may not be your thing but, then again, you just may like them as much as I do.