So I bought a fluval sp6. Itís rated at 3434gph. I know this is a lot of water moving at one time and Iím wondering if Iím pushing too much water. The pump will pump for 5 seconds loose prime and then catch again. Itís not a consistent pump. I have a 300 gallon tank that I just set up. Plz any help would do! Iím wondering if I donít have enough water in the tank/sump but I donít want to put too much water.