How to improve the water quality of fish tanks

Water quality is very important for ornamental fish to enter the tank healthily. How to deal with the water quality of ornamental fish?

We can create suitable space for nitrifying bacteria to cultivate water according to their characteristics. For example, the water monster sold in the market (which can be compared with the pictures on the Internet) is the best and most effective nitrifying bacteria culture device, which can be realized only by a water monster and a small air pump. Nitrifying bacteria can be added at the beginning, and it can be done once and for all in the future. Usually, the filtration devices we see, such as filter barrel, upper layer filtration, reverse filtration and side filtration, are only superficial phenomena, and their real purpose is to cultivate nitrifying bacteria. Ultraviolet sterilization is used to kill algae or other bacteria, and its light can also kill nitrifying bacteria. Novices should use it with caution.