Good question, glad you asked. Way back in the day when the aquarium industry decided to add wet/dry filters to aquariums. Many thought great, this is the only filtration we need! Myself included. We took out the ozone, co2, protien skimmer, nitrate reductor, uv filter, canister filter ect. We were all so smart, and we had the cutting edge, I mean human waste has processed through trickle filters successfully since the turn of the century. Well come to find out we were all wrong. I only tell you some of the history, because many have made the mistake (including me), and I thaught this would help you understand completely. You have chosen a wet/dry filter great decision, but you also need to add the protien skimmer. The skimmer is an essential piece of equipment, removing pollutants that other filtration methods fail to eliminate. Many argue about the next comment, but I think you should add a UV filter as well. UV sterilizers kill free swimming algae and more inportantly free swimming parisites. Like white spot (cryptocaryon irritants, and oodinium for exsample. SEEL LIFE... "It's a beautiful world!"