Ok... So my tank is setup and running, but I took the advice of my LFS and put some polyester filter pads in my back of tank sump... The floss is in the top compartment, not submerged, with water running over it... Then all of the other compartments are empty running to my rio 2500 powerhead back to the tank...there is probably 40 lbs. of base rock with only 12 lbs of cured live rock in the tank... My question is, what other filtration should I add... Should I just add the prawn in pantyhouse and let it go the way it is... Can I use the frozen krill I feed my bichirs instead of the prawn... Should I hook up my fluval 405... Please help, I am out of ideas...