Join Date: Feb 2013
Location: Eaton Rapids, Mi, USA
I have the evolve 8, so a little different, but:
i turned my pump output all the way to the bottom. i did some diy flow measuring with a measuring cup and figure that it is still supplying in the area of 55-60gph which is still a fairly brisk output and kinda/sorta conforms to the 10 changeovers an hour rule. the pump pulls through a generic mechanical filter, then a purigen pad, then 750g of bio blocks. I moved the pump (after extending the hose) under the first stage of the sump housing and built a little shelf for the bio blocks so you can pull them out more easily and to make sure that it pulls water through them and them only. I also found that if you aim the output nozzle straight up it agitates the surface pretty good but only really has current in the front right corner of the tank.. there is a nice dead spot in the middle and the back left corner for my fish to hang out if he so desires.