Take any petshop advise you have gotten and scrap it. Petshops are there to sell you products even if it is un needed or even dangerous to pets. On forms like this you are only going to find people who care about pets and want them to thrive. I have never seen someone come back here and have their pet become sick or injured because of poor information given from this site, now the number of "but the petstore told me to do this" I have heard is staggering.
If you have not checked out our caresheet yet it is a great read at
http://bearded-dragons.com/boards/index.php/topic,8.0.html