Getting ready to add this sweet Trigger Sapphire 34 to my long awaited new DT. This will replace my old Aqueon Sump. What I hate about the Aqueon sump is the return chamber and skimmer are on top of each other. The skimmer has been hit and miss lately - water high, water low... if it overflows, all the skimmate goes right back to the DT. blech - no thank you. Sapphire will be mechanical sponge before sock - which I will replace with cups with carbon, etc.... then skimmer, then fuge...through the black course sponge to purigen as needed and to the return. Return will go to UV and away we go.