You could do just the sump for the LR
. The LR
will take over the bio filtering and basically make your canister filter nothing more then a media reactor/mechanical filtration.
The canister has just a couple sponges to house the bacteria, where the LR
has thousands of pores to house both aerobic and anaerobic bacteria which can give total bio filtration. If you put a filter sock on the water coming into the sump, then you could actually just use the canister for running different types of media (carbon,rowaphos, etc.)