Here's a couple of short videos to help illustrate how the WP40 worked in my tank, when I placed it in service this morning.
I was worried the flow would be too strong, so I purposely angled the pump's (placed in the right rear) stream towards the left center rock pile and overflow plastic to help blunt the water force.
Vortechs MP40's only....
http://www.youtube.com/watch?v=TVnBC_8CWM8
Jebao WP40 single pump angled downwards
http://www.youtube.com/watch?v=Kmw0xBIWseY
Both Vortechs in combination with the WP40
http://www.youtube.com/watch?v=_risn3O3hWY
To say the least, I am VERY pleased with what this basic pump can do!
Art