I just picked up a CPR Bak Pak Dual Pak which is a skimmer a well as a bio filter. I have a 50g tank currently have 40 or 50lbs of what used to be live rocks in my old tank. I just ordered another 35lbs of fuji live rocks to bring the dead rocks back to live. Can I get rid of the big sump on the bottop and use just the dual pak after everything stable out and use just the live rocks as my filtration? Beside the 80 or so lbs of live rocks in there I also have 50lbs of live sands,