Part of why the fx6 dropped it's GPH almost in half is what i think, and a lot of good arguments i've read is such high gph dosnt make a great biological filter, which is really the whole point of a filter besides mechanical. Media basket can be bigger, but with such a high flow, does it matter? Just a thought.
BTW i msg'd hagen yesterday about the 2 dial knobs on the FX6, they said one is for vacuums, the other for water changes if anyone was wondering. They also have no idea when it'll be available in the states.
I suffer from MTS & have a little bit of everything