PACIFIC ISLAND AQUATICS ,enough said!!!!!Just my 2 cents, but I would not buy based on selection, but rather on quality, track record, sustainability, responsibility, customer service, where does the livestock come from and the list goes on. My opinion on guarantees is that it is important to know if the guarantee is based on the confidence of the seller in their process and health of their livestock offerings or just that they can turn over huge numbers and get the stock so cheap that they can send you a new one without losing money on their end. The "throw enough crap at the wall, eventually some will stick" approach.