just to add to the petco woes, don't expect to get very good advice there about your fish choice or tank in general. when i've been there i've asked questions, and received answers that i later found were totally bogus. again, it varies from store to store, but generally the people working there might not even have an aquarium, and may in fact know nothing about fish, they're just the only person available to get the fish out of the tank for you. your locally owned joint is so much better, and they are experts in the field and will give you the best advice. mine here even tells me when NOT to buy something, even though it costs them a sale, it's what's best for my tank, and i appreciate that.