The "boxes" for the LifeReef's are deeper then on the Eshopps ones, which provides better flow. In addition they are built better (( I have both )). If I had to do it all over again I would have bought enough LifeReef inside of the Eshopps -- I had to modify the U-tube, since the baffle in the back wasn't high enough and it lost siphon each time I stopped the main pump.