pump in series but not sequential

[Sadasius]

Yes it does. I especially noticed when I was bleeding the system because I was activating one pump then the other. The bubbles raced around and when I activated the second pump the bubbles were getting sucked down to the bottom of the res and I have the 250 EK rev 2 res. Pic or it didn't happen! I should empty it and redo it and take a video to show that yes there is a difference. I don't know why it does actually because wouldn't the pumps be always at the same speed and the flow stay the same as well? I am thinking that one pump helps to relieve the load on the first one and makes everything travel faster.