How do you choose the right species of fish for stocking aquarium big fish tanks?

When selecting the right species of fish for stocking aquarium big fish tanks, several factors need to be taken into account, including the size of the fish, their behavior, dietary habits, water quality requirements, and whether they are suitable for group living. Here are some suggestions:
Size of the Fish: Firstly, it is essential to ensure that the chosen fish species can adapt to the space provided by the large aquarium. Large fish, such as some sharks or giant freshwater fish, require a much larger area to roam freely. At the same time, it is important to avoid mixing fish with significantly different sizes, as larger fish may attack smaller ones.
Behavior of the Fish: Different fish species have distinct behavioral patterns. For example, some fish prefer solitude while others thrive in groups. Understanding the behavior of the fish will help you decide whether to keep them individually or in a mixed tank, ensuring they can coexist harmoniously.
Dietary Habits: The dietary habits of fish are also a crucial factor to consider. Some fish are omnivorous and can accept a variety of foods, while others are carnivorous or herbivorous, requiring specific food sources. Make sure you can provide appropriate food for the chosen fish species to meet their nutritional needs.
Water Quality Requirements: Different fish species have varying water quality requirements. Some fish may be more adapted to hard water conditions, while others prefer soft water. When selecting fish, consider your water source and water quality conditions to ensure the chosen species can thrive.
Suitability for Group Living: If you plan to mix multiple species in the aquarium, their compatibility in groups is another factor to consider. Some fish species fare better in groups, while others may be better suited for solitary living.
Additionally, some highly ornamental and easy-to-care-for fish species, such as guppies, can be considered. Guppies come in a variety of species, are small in size, have mild and lively temperaments, are moderately priced, highly ornamental, and easy to raise. However, the final choice should be based on personal preferences and the actual conditions of the aquarium.
Overall, selecting the right fish species for large aquarium tanks requires comprehensive consideration of multiple factors. Prior to making a choice, it is advisable to have a basic understanding of the candidate fish species' behavioral patterns, dietary habits, water quality requirements, and other characteristics to ensure their healthy and happy growth in the aquarium.