I guess another factor is cost.  Aren't Iwaki's quite a bit more expensive
than a Mag?  I have a Mag 12 as my main return on my 125 gallon reef, and I
love it.  It only cost me $89  FWIW

Craig

> Andrew,
> As mentioned, I use an Iwaki 700 RLT to run my 70 gallon system. I guess
the
> question for you is what exactly do you want to run with it? The reason I
> ask it because with my 700 I run a chiller attached to a sea swirl, a
berlin
> skimmer, a chemical reactor, and two other outputs. Basically, the thing
> runs my entire system. The only thing I don't use it for is to run my
> refugium. If you plan on using the Iwaki for multiple returns or really
high
> water flow, then something in the 700 or higher range would work for you.
I
> would get one rated higher than you think you need, cause that will allow
> you some flexibility. The Iwakis run fine with a little back pressure, so
> you can put ball valves on all the outputs and turn them up or down as you
> see fit without damaging the pump.
>
> I am very happy with the performance of my pump. It does however add a
> decent amount of heat to the tank, and although it is not noisy, it is not
> the quietest thing in the world either.
>
> IMO
>
> Shane C.

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