I don't know...I am thinking I will do 4 inch by 13inch socks...but, I have to see...this build is going to be a bit different, as this tank is for Freshwater stingrays and I will need a bit of a different set up. I am going to go with a reef type setup that you all run on your tanks, with some slight modifications...still working out the details in my head (which is kind of crazy)...LOL