Generally, the diameter of the upper water pipe for the 120 fish tank is about 10-15 mm, and the diameter of the lower water pipe is about 20-30 mm. Generally, the radius of the lower water outlet is 1.5-2 times of that of the upper water outlet, so that the water flow can be better filtered. In addition, in addition to pay attention to the specifications of the upper and lower nozzles, but also consider the flow rate, according to the size of the fish tank, choose the appropriate flow rate of filtration is correct.
1. Filtration: No matter what kind of fish tank, filtration equipment is essential. Filtration and non-filtration are completely different. Fish tanks with filtration can change water once a half month, and the water quality can be maintained well, while fish tanks without filtration need to change water once a week. Filtration can improve water quality, so that fish can live better.
2. Lighting: Lighting is also important for fish, especially for some fish, which need certain lighting to develop color. And appropriate light is also necessary for the growth of aquatic plants in the fish tank, which can promote their photosynthesis, thus releasing a certain amount of oxygen to prevent the fish from hypoxia.
3. Heating rod: Generally, the water temperature needs to be controlled for fish farming. Except that some eurythermic fish do not have high requirements for temperature, tropical fish are still relatively strict with water temperature. Generally, it should be kept between 20 and 30 ℃. If the temperature is too low, it will not only affect its appetite, but may even cause the death of the fish.
