Anyone interested in my test setup, here are a couple of images. One is of my flow meter and homemade stand. The plug on top is there until my screw in thermometer arrives later this week. The other picture is of the test to determine the necessary flow rate by adding food coloring to the water in the tank, and I only had green available. The thing entering the tank is a stainless steel tube small enough to go through the core of a Hewes reel. By adding a rubber stopper on the end, I can plug up a plastic tank for forced washing, as well.