My little one is seven years old. I sent her to spend a couple of weeks with my Mom outside the country. She will be back home tomorrow. I call her every day just to see how is she doing and everytime we talk over the phone she goes "Mom, I want you to take good care of my fishes, I don't want any of them to die". We have a small tank with 6 tropical fishes. We also have 2 bettas. One of the bettas died this morning! I took good care of all fishes as I always do but now she is going to think that I didn't. What should I do?