I will be running 2 externals in a 4ft Or 5ft, haven't decided yet and not sure on which one, i'm now hearing great reviews on the eheim,
Which would you go for?
I have an eheim 2215 on a 3ft... And have voted tetratec. I just don't think eheim classics have the oomph needed for a tank that size. I wish I had gone for the 2217 on my tank.
I can't fault the filtration though, and it's silent enough.
I know it's not on your list but have you considered the FX5.
I got one when I converted back from a marine tank (I had previously been a fan of eheim!) and I think it is great - loads of space for media and really good flow.
Fluval FX5 you can pick them up second hand for between £65 - £85 and dont worry about loss of flow as they dont really loose it - its all about the angle of the nozzles.
Fluval FX5 you can pick them up second hand for between £65 - £85 and dont worry about loss of flow as they dont really loose it - its all about the angle of the nozzles.