Glofish seeming to die for no reason

Question
I've had my 10 gallon tank set up for 5 days before I put in 6 glofish. I had the water tested and all the levels were good. That night 1 fish seemed lifeless, floting by the top of the tank, it died a few hours later. The next day I found another dead ( it was stuck to the intake for the filter - I don't know if it died because it was stuck, or had died before that)over a week had passed and today another fish was hanging out at the top of the tank. It swam to feed and seemed just fine, but it died 4 hours later. I've checked the Ammonia, nitrate, nitrite, hardness, chlorine, aklalinity, and ph every other day and the levels all come back good. The fish don't seem to have any illness before hand, swimming just fine and interacting with each other, No white spots or anything. We feed them every 12 hours ( aproxx). These fish were a gift for my toddler, and I was hopeing you could give me some insight on why they could be dying.
We've also have 3 ghost shrimp, 1 had died, but the other two seem to be thriving and eating just fine.  

Answer
Sammi,

  Sorry to hear you are having problems. When you test the water, are you doing it or are you taking the water to your local fish store to have them test it? Is the water being tested with test strips or the liquid water testing kit? Is your heater set between 72-82 degrees? It is strange that the water would test just fine yet you are losing fish. A tank set up takes between 2 to 3 weeks, so putting them in at 5 days is a bit early. It takes 2 week for the initial bacteria bloom to hit the tank. Glofish need to be placed in a cycled tank, or you run the risk of losing them. If you want to keep Glofish, I would suggest you cycle the tank for 3 weeks before you place any in your tank. They are very delicate fish and if the tank is not set up properly you will find your fish dying.