Ive seen 2 waveboxes on over 2m long tanks. The waveboxes were positioned only on the one side and man those were big waves. All the dirt literally gets suspended and my view it work better than a closed loop. Adding some extra Tunze Streams for flow you would have the perfect setup. Did you evr see a tank using a wavebox, if not have a look at one similar to your tank size than decide. Better to look before you buy right.