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After buying new koi fish, stable water quality is the key to keeping them alive
People who keep fish at the Japanese Consulate-General in Shanghai probably all know about Japanese koi to some extent. As a traditional large ornamental fish of Japan, koi are precious and brilliantly colored, and are called "living works of art," "living gems in the water," and "the king of ornamental fish." However, as early as 2003, because Japan...