Currently I have a 10 gallon freshwater aquarium and I have had it for a year. I have had mollies, guppies, tetras, and platys. I am planning on moving to a 50-75 gallon freshwater tank. I thought of first getting used to the tank using my regular guppies mollies tetras and platys to get used to the way that a larger tank runs and then slowly move up to larger and more complicated fish. Are there any recommendations about other ways I could do this or if this is even the right idea? also recommendations of some freshwater tropical fish that would work well together. Thanks!