I am thinking to build an algae scrubber based on the "principle of communicating vessels" from physics. This principle says when using two receipients linked together with a U-shaped water-hose, if you pur water in one of them, the water goes in the other one untill both levels of water reached the same altitude in both receipients. Now everything is static here and no pump is necessary and no water movement after the water level is up on the second/small receipient. My question raised now would be if the alage are migrating throught hose from the tank to the new receiping withouth using suction? Ideas? I can as well be using a Marine land hang on back filter with some plastics as scrubbers and a red small light running 24/7. Does the trick work? It should!