Build a fish pond on the balcony

Quick answer：

Building a fish pond on a balcony can be a rewarding project, but it requires careful planning and consideration. Firstly, you must ensure that the balcony can support the weight of the pond, which may require structural reinforcement. Next, you should choose a suitable location with proper drainage and avoid direct sunlight to prevent overheating. The pond should be lined with an appropriate material, such as pond liner or rubber, to prevent leaks. Additionally, you'll need to consider water quality, aeration, and the appropriate plants and fish for your environment.