If I double the periodicity (is that a word?) then I get the "twisty wave" going with the opposite corners. Guess I can try that and see what happens.
Right now it's really obvious as there is a fair bit of particulate in the water column from the diatom bloom. There is ZERO effect from the waveboxes if the sump return is on, regardless of whether the other Tunzes are on or not. There is a "not bad" wave effect if the rest of the powerheads are off AND the sump return is off. But even then it becomes a "marginal" if the Tunzes are allowed on. There must be too much interference.
I dunno I guess I'll give it a while yet before pulling the plug on them but I still think their days might be numbered.
It is a very large area that they take up that maybe a MP40 could sit in instead.