We are setting up our new Red Sea 425 GT and we are adding a Vectra S2 pump. We have everything plumbed in and turned on and running but it’s loud. How do you determine the flow rate? I know the maximum is 1400 but it it proportional? It’s like we can hear the water rushing through the system and it’s so loud it’s difficult to watch tv over it. This can’t be right. Any help?