The undertow created by these pumps is what impresses me the most. I had koralia evos before vortechs. If you were to put one koralia evo on the side of a 75 and run it...then compare it to one vortech running in the tank it is truly no comparison.
I have a 100 gallon rimless (unfortunately downgrading soon) and I love my MP40. I have had it running for over a year and only have one negative thing to say about it: SPS within 8 inches of it grew into a funny pattern toward the pump due to the tremendous flow it produces. I had it cranked up because the far side of the tank was a bit dead unless I did so. My suggestion like so many others is to get two. Sync them, and keep them at medium flow. If I was keeping my current size tank I'd be buying another one yesterday
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