Although I'm not a fan of Coralife stuff and I really haven't heard much good about this skimmer...I think you would be best to spend a little bit of dough and get an ATO setup. Take a look at this one...
http://www.bulkreefsupply.com/Auto-T...duct_info.html All you need is the container and a pump along with this kit and you will have a much better chance of dialing in your skimmer.