I had to throw my underwear into the laundry just now...

[support@proline]

This is my own tank I am in the process of setting up ,
In the bottom picture you will see the 2 holes which will be used as an intake for an RDII pump ,the pumps will be dimmed @ opposite so
pump A 100% -------pump B 0%
pump A 0%--------pump B 100%
so you will create suction out of different holes in different amounts in a set period.
The holes on the overflow pane will be used as the output in a cross patteren,so the one line will blow the other @ 0 & vice versa.
This will eliminate the need for any Oceanmotions,Wave box & other methods ,the currents changes are alot more gentle & also the current will become less directional & more irregular