Different
I wonder if there is any flow through the tube? It would have to be set up with two tubes so a pump could force water through one and the other would keep the tanks the same level. If there isn't any flow I would think that water in the tube would get kind of hypoxic.
How do you clean it?
Water flows through the highway continuously so the tank filters clean the water in the highway. Algea is removed using cleaning magnets for acrylic tanks.
How does water flow through the highway?
Water is pumped through a separate pipe from one tank to the other using a small pump. As the tank water levels change (one rises and the other falls) flow is induced through the highway by the force of gravity.
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