The water quality management when opening a crock newly is to raise a success crucial, among them the education that the most important still is nitrify bacterium. New crock filters it is mature that the nitrify bacterium in the system wants 30-45 day ability to foster. To make nitrify bacterium matures at an early date, when matching good seawater to begin locomotive system, can join nitrify bacterium, join shellfish flesh and shrimp flesh to provide food for nitrify bacterium. Also can ask for those who had used to filter to briny fish store cotton and filter coral is arenaceous, can shorten the education time with nitrify mature bacterium.

Two weeks such is in or fish trying water can be put first after 30 days, give priority to with small-sized fish. If try water fish,do not die one week later, want to measure nitrite content, if can be at ease below in 0.05-0.1/L,put the fish that you like, but cannot put too much.