I am helping my 10 yr. old niece set up her first tank that she got for Christmas. It's currently just aging a little right now--we set it up just 8 days ago. She is counting the hours until she can have some fish in it. She has her heart set on Gold Pristella Tetras that she saw at the pet store. I've had tetras in my tank for years, just not that variety. Are they easy to care for? She can't have many because she only has a 5 gallon tank, but I was going to let her get three if I can find out that they would be a good starter fish. I tried to interest her in guppies as a first fish, but she didn't care for them. If anyone has them, let me know how easy/hard and delicate/hardy they are to care for. Thank you much. (If I've done something wrong with this post, forgive me, I just signed on this forum a minute ago so I could post a question--hopefully I haven't broken any rules).