Most fish problems start before a single fish touches the water. People buy a tank, fill it up, add fish the same day, and then wonder why everything goes wrong a week later. So slow down. Setting up a fish tank is less about decoration and more about patience.
First, decide where the tank will live. It sounds basic, but it matters. You want a flat surface, away from direct sunlight, heaters, and noisy traffic. Fish don’t love temperature swings or vibrations. And neither does glass filled with water. Once it’s placed, that’s where it stays. A filled tank is not something you casually move later.
