How do I set up a safe aquarium for my fish?

Setting up a safe aquarium involves several key steps to ensure a healthy environment for fish. First, choose an appropriate tank size based on the species and number of fish. Rinse the aquarium and all decorations with water (avoid soap) before setting up. Next, add a substrate such as gravel or sand, ensuring it is suitable for the fish species. Install a filtration system to maintain water quality and an appropriate heater if tropical fish are chosen. Fill the tank with dechlorinated water and cycle it for several weeks to establish beneficial bacteria. Introduce plants and decorations to provide hiding spots and reduce stress. Finally, acclimate fish slowly to the new environment to minimize shock. Regular maintenance, including water changes and monitoring water parameters, is essential for long-term health.