I have purchased supplies from these sites. I've never purchased fish on-line, but would be willing to try if I couldnt find what I was looking for locally. Usually, I wait until I need several items before shopping on-line. That way the shipping doesn't raise the price so much that the single item is about the same price as Petsmart or one of the other LFS in this area. If I need something now, I usually end up at Petsmart...the service isn't the greatest, but their usually MUCH cheaper than the privately owned shops around here.
[url]http://www.aquariumpros.com[/url]
[url]http://www.bigalsonline.com[/url]
[url]http://www.thatpetplace.com[/url]
[url]http://www.ecosystemaquarium.com[/url] (this one will sell and ship to you if there is not an authorized dealer in your area. I think their vitamin supplement is very good. EXPENSIVE, but good

)