Is that the new DangerDen pump?
damn, those guys think of everything
its is very close to my design Cathar, i was only 16-17 and had no clue what i was doing at the time, so it is quite an improvement.
I still dont get why pumps designed specifically for systems that wont have any particles, rocks, or stray submarines in them still have to use a impellar that either moves or has gaps around it for them...