I have tried this a couple times before with no success so i always turn back, but now i want to try it again.
When ever i did have a refugium the chaeto never grew and would just float to the top. I have tried using a MH light, pc, and regular light bulb. I have tried no sand bed, 4" sand bed, and 1" sand bed. I have even tried it with a korilla nano, maxijet, and no powerhead.

So can someone shoot me some ideas on what i should try or what is working for you. The area i have set up for the refugium measure 1'x1'x18"tall