Bidirectional tidal flow

[golf nut]

Originally Posted by StirCrazy

all that looked like was a ocean motion device with a common inlett and two outlets.

Steve

Except is isn't, both the inlets and the outlets reverse to direct flow through the tank and also to be pulled out on the opposite end, each is aiding the other.

[golf nut]

This is one of a pair that were installed an a good sized tank in a public aquarium, these were equipped with proximity switches and then driven by a PLC, this would alternate flow as in the video but enable to turn the tank clockwise or anticlockwise when viewed from above, ideal in a through wall viewed tank.