I only have the biocube 29g right now. Some of the pictures I posted were a bit older but I wanted you to see what I did in my old 29g straight tank.
When I did have her up and running though the ph was at 8.3, I used an odyssea 4 bulb fixture for lights and I added a remora hang on back skimmer after a while. I was running an AC50 as well with good results. I managed to get to 0 nitrates after awhile too so it can be done.
I currently have a 20g tank setup as well, mostly corals. i do not have a skimmer for that one either and it is running an ac50 for filtration. I just added a 4 bulb fishneedit.com light fixture.
I still have my concerns about putting a tang in that tank, I haven't forgotten. LOL Isn't there another fish you can get that will make you happy that will be HAPPY in a 29g tank?