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How to make a fish tank filter without electricity? What do you think,The cycle of water requires power,Where is the power without electricity?
Junior high school chemistry simple filter Items needed: bottles,Stone,Fine sand,Activated Carbon,Gauze,Cotton.Production methods as shown in Fig,The red line is gauze.Stone,Fine Sand: insoluble impurities in filtered water.Activated carbon: absorb pigment and peculiar smell in water.Gauze: separate different materials.Cotton: prevent activated carbon from falling into the water.