I use the configuration in Giancarlo's top drawing in all my tanks, I much prefer it for the reasons he mentioned, and also because Eheim performance (like any canister) will be better the shorter the hoses are--and it's best to keep the lengths on the intake and outflow sides as close to equal as is feasible.
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> create excessive current.
I was saying that a 2028 used with a rainbar would not create too much current. I was answering a specific question.
On a 120L even a 2026 would work.