1, cylinder washing and disinfection. The first thing to buy a cylinder is to wash it. After washing, you can soak in potassium permanganate or sea salt for a while. Potassium permanganate should not be too strong, and then clean the fish tank. Of course, if you put decorations such as stones, you'd better soak them. Rinse with clean water after soaking.

2. add water. Generally, tap water is directly added, and the water can be allowed to stand for a few days in advance if conditions permit. If tap water is directly added, the filter should always be on after adding water, and the heating rod for raising tropical fish should also be on for a day or two.

3. Add nitrifying bacteria. After filtering for a day or two, put the nitrifying bacteria into the fish tank. If it is a good nitrifying bacteria, the water in the fish tank should be mixed. At the same time, add a few pieces of shrimp or fish food to keep the water circulating. The water will gradually clear, shrimp or fish food will disappear, and the water will stick when it is raised. The time is usually three to five days.

4. Put the fish in the jar. To put it bluntly, just put some fish in to try the water. When you are a mouse, you are usually fine. If the fish is still alive, it can be officially released.