Yes, I would have it pulling water through rather than pushing it.
I don't really want to replace the impeller as last time I had to buy one it cost over $50 and also the pumps on the 2213's are really crappy. If I put a more powerful pump on after the filter I could then run either my co2 reactor or inline diffuser, with the normal 2213 pump I think it would struggle to put out enough flow for this.
I was just going to run a loop system just like a canister using the pump but thought why not use the spare 2213 as well for extra biological filtration.
The only thing I could see going wrong is the seals on the 2213 not having enough pressure to be able to cope with the extra power of the eheim 1060 pump but I think it would be fine as long as the pump was connected after the canister.
Just to clarify I do not need the extra filtration provided from the eheim 2213 but it won't harm my setup either by adding more biological filtration.