Bidirectional tidal flow

[madkeenreefer]

If the OM drum needs only to rotate 90deg to open the opposing ports then you could easily calculate the RPM of the OM valve.
Lets say 2rpm that means every 15sec 90deg is achived.
Theirfore if you have a adiquite timer you could eaisly switch power off for 6hrs then turn power on for a period of time which would be chosen bye increments of time such as 15sec (90deg), 45sec (180deg) ,1:15 (270deg) ect.(creating random flow to simulate the changing of the tide) then close the power to the OM to have the flow comming out of the other ports
make sence?