Dont stress itz...I loved mine! I just topped the air up about once a week. They can lose a lot of air before any water spills cause the water holds the plastic tight. I was supprised when mine popped, had time to pump the lot out the window, not a drop on the carpet. You'll end up keeping it once you see how much more happy your fish are! I felt like such a b*****d squeezing my fish back in a tank that I ended up building an indoor pond. Much cheaper bigger and alround cooler for the fish, especially if you put in a window. My hyper aggressive cons wouldn't live with ANYTHING including each other, now they are pretty chilled, even the breeding pairs. Just dont let your dog near it, or your ferret!