What animals are there in the aquarium?
Aquariums can specialize in marine life or freshwater life, or both. There are public aquariums for viewing or popularizing scientific knowledge, as well as aquariums dedicated to scientific research and teaching.
The design of large aquariums must consider the requirements of various species, especially because the exhibits of modern aquariums include various aquatic organisms, such as mammals, birds, reptiles, amphibians, invertebrates and fish.
The gas in the aquarium water must be in balance with the atmosphere to ensure that there is enough oxygen in the water; While avoiding supersaturation of nitrogen. In the recycling system, the treatment of water should not only ensure the clarity of water, but also ensure the purification of excreta.