Dan Feller;1398830; said:I thought about stacking them vertically, but I don't have the height available in my sump.
It certainly would be more efficient, but I have LOTS of extra flow (the same pump used to run a big skimmer in addition to recirculating).
I like the idea of a sloped tray with the water driving the wheels from beneath.
Thats actully a design I came up with to use hydro5 filter sponges as bio wheels for pond use or eventually for my 20k container tanks.
