1) A lot of the time you are dealing with someone who likes to consider themselves a "Husbandry Expert" because they recieved some kind of brief training on how to clean out the cages when they got hired. They rarely have the proper advice to give, and if you ask something they don't know the answer to... Rarely will you hear "I don;t know, let me ask someone who does." In an effort to keep up their "Husbandry Expert" Ego they will just feed you a line of misinformation, instead of finding out good info for you. Always do your own research ... consult people such as breeders and experienced keepers when it comes to husbandry advice and not someone who has somehthing to gain from a lie... Breeders are great sources of info... as they want to sell to you but at the same time, with this community being so tight nit, they have a rep to protect, so they can't get away with, or really benefit at all from spewing out faulty info.
2) Secondly, Most pet stores only care about the sale. The health of the animal and the husbandry it recieves do not matter if they are able to make a dollar on the sale. Most pet stores I have been to that sell Chams don't even keep their Chams in the proper conditions, let alone sell the items necessary to properly keep a cham. But they still sell them... So when someone comes in and they want to buy a cham... But the store only carries Glass tanks... Guess what kind of tank they are going to tell you your cham needs to be in?
3) You would be suprised how many products on the market are being sold, that really shouldn't be used at all... Heat Rocks, CalciSand, Compact Flourecent Bulbs, waterfalls... all this stuff is widely sold at all the pet stores, and at the same time widely known to be bad for the animals in the serious herping community. The only reason these things are still on the market is becasue the pet stores are able sell them to the "first time owner" who really doesn't know any better. The customer trusts that the Pet Store will provide the proper info, And the pet store takes advantage of that trust to make a sale.
Return your cage... or keep it, and buy a screen one for your Veiled, then you can wait until you get a little more experiece and use the glass one to house Brevs! We can help you find a nice reputable dealer who can set you up with a quality animal, and then we can make sure you recieve the proper advice on caring for it.
~Joe