I purchased a 55gal freshwater tank for our home, along with several fish. I was happy to hear that Petland offers a 7 day guarantee on their fish. Hoping I wouldn't have to use this, I did keep the receipt. Unfortunately, some of our fish did not survive their first week in our new aquarium. After returning the fish, and providing a water sample (which was tested for various qualities) we were told that we could replace the fish that were lost, or be provided with a store credit towards any other fish. We picked out several more fish, which, in turn, also had a 7 day guarantee. A few of these fish perished as well, and we were happy to report that they, too, were replaced with no questions asked. Petland's 7 day fish guarantee with keep us coming back to purchase our fish here for a very long time.