Here is a manual I scanned. If you can't make it out let me know and I will rescan it with a better dpi.
I found the most important step is to set the venturi for a height of 1 5/8" from the lowest postion possible and then make small adjustments in height from there. Make sure to let it run a mininimum of 1 hour to see what kind of skimmate you get after a height adjustment of the venturi.
I too am using it to cure my new 10g tank. All I have is live rock and sand because it is still cycling. It pulled out some nice green tea colored skimmate for a day and now nothing which is normal seeing there is no real bioload yet.