I think you helped me over on my post in APC. Thanks so much, I didn't even think about how I would do the turns. I'm going to Home Depot / Lowes this weekend to look at some supplies.
I will raise the waterfall chamber sufficiently to stack in a layer of sponge and bioballs!
I'm not sure what the difference of a hybrid pump is?
I was looking at this magnetic drive pump (mainly cause it was shiny)...
Here is a hybrid one for about the same price, more energy efficient?