Bobbofin
Non-member
Check out video of two Tunze 6040 (1190gph) in inverse wave mode on my 40 breeder. The Midi 5 Din cable cost $9.00 to connect them together to accomplish this. Pumps are set to 3/4 speed to keep the flesh on the corals and sand on the bottom.
https://www.youtube.com/watch?v=-QHKYJknLfE
https://www.youtube.com/watch?v=-QHKYJknLfE