Hi all...I have an Aqueon proflex model 2 sump...I have the bio media kit with bio balls and drip system...I have a heavy stock so im adding a bunch of eheim substrat pro to the equation...I've never had a sump and this may be a dumb question..the only place left to put anything is the return chamber where the pump is..is it ok to put a bag of media in with the pump? I love the design of this sump but the model 2 doesn't leave much room for anything besides return chamber...I can't even put my heater in there 
