I've got a 9 ft 420 gal tank. I have to mount the wavebox externally. I have a clear shot end to end. I can only mount the wavebox at one end. I am going to make a box and epoxy it onto the tank and drill the appropriate hole. I assume that I will need to oversize the box to move more water as 2 waveboxes would do. Given that the wave frequency will be over 2 seconds do I need to use a 6301 pump or would a 6201 be sufficient because it has more time to empty the water? Thoughts ?