Originally posted by TheRed
...I have a protein skimmer in one section, my sand and live rock in the middle, but what do I put on the other side?
>>>That's where the "return pump" to the tank would go if you are doing a fuge in center layout<<<
Also, do I put bio balls in the overflow?
>>>Not needed, if you have adequate LR in the main tank and/or supplemented in the fuge<<<