I have just setup a red sea desktop peninsula however it appears that the overflow drain is not working correctly. It seems to be... Well... Overflowing. It is meant to drain into a little hole in the far right of the plastic overflow grating peice but just fills up too fast and overflows into the rear chamber bypassing the filter sock and making a load of noise. I have attached a video. I am using red seas 950lph pump designed for this tank but seems like its too powerful?