Be very careful when using gift cards on Aqua Cave's website. First when you purchase a gift card from them, they do not send it the next day. Second, when you use cards and their system fails, they can lock you funds up for over a week. I still don't have it fully resolved and they show charging to my card by the card company, yet never completed the order. I have never had this problem with other mail order vendors. I did call them and they point the finger to the card company. The card company points the finger at them. A disappointed customer.