Im building a horizontal type of scrubber, where the water and algae will only be on the top side of the screen. Can I use half of the 35 gph per inch recommended flow?
Not really. Since the screen is horizontal, it does not have much gravity pulling the water across it, and thus the flow becomes slow and “thicker” (it builds up). This is in contrast to a vertical screen where the water rushes down faster in a thinner stream (which works best.) So to get the speed of the flow higher in a horizontal version, keep the same 35 gph per inch, even though it’s all flowing on just one side.
Not really. Since the screen is horizontal, it does not have much gravity pulling the water across it, and thus the flow becomes slow and “thicker” (like a pond). This is in contrast to a vertical screen where the water rushes down faster in a thinner stream (which works best.) So to get the speed of the flow higher in a horizontal version, keep the same 35 gph per inch, even though it’s all flowing on just one side.
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