So for my new build which is taking absolutely forever, I was originally going to use a Gyre or two, but after using two for quite some time, I have decided I don't particularly like them. So I think using ecotech vortechs on the new build is what I am going to do. It is a 90 gallon, will be mixed reef, with a sand bed. My question is, how many pumps do I need? Way back with my first display tank I had 2 korallias, which did okay, but I feel the 2 opposite corner pump idea does not circulate the water enough, almost everywhere (no such thing as everywhere unless you go above and beyond). But I have never used more than two pumps in the tank, so I also have no idea where I would place a third or fourth pump. If you guys think that using vortechs makes all the difference and I can use two, I will try to believe. I would greatly appreciate some input on this. Thanks!!