Does the fish tank of 20 centimeters does not need oxygen pump. This kind of fish tank is too small to raise big fish and too many small fish, so it is of little significance to install oxygen pumps. Only larger fish, such as arowana, map fish, Luohan fish and so on, need oxygen pump to oxygenate all the time, so as to avoid floating head. If you have guppies, goldfish, zebrafish, bettas, etc., it doesn't matter if you don't use an oxygen pump.
1, arowana: arowana is currently more common large ornamental fish, it has many species, such as silver arowana, goldfish, red arowana and so on, different species of different colors, the difficulty of raising is not the same. If you want to raise arowana well, you need to provide suitable temperature and good water quality, and pay attention to feeding and lighting, so as not to lose your eyes.
2. Parrot fish: Parrot fish, also known as blood parrots, are small in size but have a high demand for oxygen, so they need oxygen pumps to feed them. It is an artificial hybrid of ornamental fish, due to genetic defects, resulting in its mouth can not be closed, if the oxygen content in the water is relatively low, it will affect its breathing.
3. Siraitia grosvenorii: Siraitia grosvenorii is a large tropical fish with a high demand for oxygen. This kind of fish has sarcoma on its head and looks like an arhat, so it gets this name. It has many varieties and different colors. It has high ornamental value and is very suitable for family breeding.
