I have to admit I have never read any pubs on that unit except for the one included with the turbo twist. They have a line graph showing gph. Vs what type of flow will kill various organisms. The min. flow for the 9 Watt is graphed at 54gph. I set mine to 51gph just for a bit of margin. Anyway my dinos yelled uncle and the tank water is basically invisible. I am very pleased.
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