Tropical fish in a home aquarium are beautiful. They also have the benefit of helping their owners reduce stress. Studies have shown that owning any pet helps human health. Fish, in particular, can be soothing additions to any home. The pleasant sound of the aquarium provides background noise that is hardly noticeable to the conscious mind, but it will register subconsciously. Sometimes adding fish to tank and sitting back and watching them swim in a well cared for aquarium will help you forget all the problems and stressors of the day.