(2) Eheim 2217 vs. FX5

  • We are currently upgrading MFK. thanks! -neo
I would go with the pair of 2217. They will more then be enough filtration for your 150g, plus it's always a good idea to have redundant filtration. If the single FX5 were to fail, you may lose all your stock before you can get it fixed, or another filter going.
 
I'm sure the FX-5 is a good filter, but I think Eheim is the best. I have a 2017 and a 2217. Very quiet and extremely reliable.
 
Both are quality filters, although I don't use either one. The thing is I would never run a tank with just a single filter.
 
The redundant filter argument is quite valid, but is it worth spending 2x for an event which may or may not happen? Particulalry, since the FX5 does not appear to be subject to premature breakdown. In the event that the two-filter scenario is compelling (and it does make sense), I would go with the two Rena XP3s. I have had a pair running on a 150 gallon tank continuously for 3 years without even a hint of malfunction.
 
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