[fishytime]

I always say this to customers at the shop......"anything we can do in our little glass boxes pales in comparison to what mother nature puts a reef through.....as long as your sand stays put, up the flow".....just remember that it is almost impossible to make every coral in your reef happy at the same time....your turnover is probably less that what Bloodasp pointed out because of "head pressure loss"..... a wave box would likely be anoying with a coast to coast overflow, as there will splashing at either end of the overflow.....waveboxes work best with a center overflow....Ive got about 96 times turnover/hr in my tank.....sps love it.....lps not so much...