The Tank itself is a 150 Gallon tank with a 35 gallon sump that is three years old but only growing acros since November of 2014. I have a refugium used mostly for the growth of pods as their is not much light. I have a Diablo XS 225 skimmer. I run GFO and a sulfur denitrator. I have a Mag 18 return pump for a bare bottom setup with 2 Vortech MP40 and 1 MP20 and a Hydor evo 1300.