Ehiem Pro Cansiter used as a reactor possible?

[hillegom]

All those in the regular reactors tumble to be more efficient. Each has their own specific gravity, so they require different g/hr hence different reactors.
I am not sure that this plan would work efficiently, as the canister water flows down and not up. Maybe I am wrong,I don't have experience with canisters so do not know the direction of flow.
However, if the flow is too great, the particles will grind each other into small pieces.