So I have the Red Sea reefer peninsula 650 plumbed to a 7.0 Pump. According to the flow chart below, I am running at 13ft of head pressure at 550gph. I’m using the Neptune 1” flow sensor to give me my numbers and I tested with two different flow sensors to make sure the sensor was working properly. I’m trying to run the Triton method and need about 1000 gph flow. So I bought the Sicce 9.0 Pump from bulk reef supply and installed that pump. Now I’m getting 670gph. But according to the flow chart, at the same 13ft, I should be getting around 1500gph. Something does not make sense, has anyone else had issues like this?