With a little wood work I plan to put a 30 Gal AGA aquarium under my 55 for a sump / refuegium. I plan to use 5 baffles two on the overflow side under/over into the refuegium and 3 on the return side under / over/ under. I just siliconed the first baffle in to the 30. I plan to put my bakpack skimmer in to the first compartment with the tank over flow. the refuege will be 20 " long with a depth of 12" I plan to post pictures of this project as it progresses. Any suggestions as to what substrate to use? how deep? or thoughts on my baffle arrangment would be appreciated. I plan to test the unit with a RIO 2100 pump the RIO claims 350 GPH at 4' head and a container set to tank heigth I plan to use an Aquacrylics over flow box, I like the simple design of the overflow. If over flowbox handles the RIO should I try a bigger pump??? Thank you all for the information on the site and your replys.

In the drawing the left side contains the skimmer and tank overflow the right with the return pump. The fuge will be in the middle 19" long and water level of 12 " will test tomorrow and post pictures.

Stephen