Hi I am very new to having fish and I’m very worried because my balloon belly Molly only swims at the top of the tank. From what I can tell it doesn’t swim around the tank much at all. I also have two guppies that swim around the tank, but my Molly rarely visits the bottom half of the tank. I have a filter in my tank as well as an air stone. I’ve only had them for two days so I’m not sure if it’s because of that or if I’m doing something wrong. Any help is appreciated!!!!