I am also looking for something to put in the corner of my 180g - 6x2x2 - and push very gentle flow where the gyres don't reach
Would this work - or is it going to be too powerful even turned way down?
Does a great job in the back corner of my 5x2x2 to move water behind the rock work. It has a wide range of flow and can be set quite low but I can’t imagine you’d use it below 25% on that big of a tank


