We have sold vortechs for quite a while. I finally got a pair of Mp40s  for my own personal tank. All I can saw is wow!  The pair replaced 4 hydors with a wavemaker and the two are much quieter, provide flow in reef crest mode that is more random like a true reef.  They were extremely easy to set up and use.  For anyone on the fence, don’t put it off, you won’t be dissapointed.  A great plus, like TB Aquatics, Ecotech Marine is a first class company that stands behind their products!