Don't let any of the frank replies here get you down. There seems to just be something in the water here the last few days. I can assure you though, everyone is happy to help and wants to see you succeed. so consider all of the info here, post up some pics as often as you can and if you run into any trouble dont every hesitate to ask here!
RE; the RODI, I just bought and installed this unit:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=120416574520 It works great, but a word of caution with this seller. I had to tighten just about every connection on the unit after the initial test, to finally get the system to stop leaking. If you choose to buy any of the Ebay variety out there, I highly recommend that you partially disassemble it before you ever attempt to install it, and go over it carefully to make sure that all the connections are made as snug as possible. Also, if you dont already have one, get yourself a TDS meter. It will tell you how your RODI system is performing.
Also, you really owe it to yourself to do the research on skimmers if you doubt in any way the advice you received here. I think you will notice improvement by running your skimmer 24/7
You could also stand to have some more live rock. the range usually recommeneded is 1-2lbs per gallon. It's not that you dont have enough, it's just that you could have more. (since you already have so much you could just buy dry base and add it to your tank and Presto Chango, you've got LR)
One last thought, I don't recall seeing your flow rate discussd here at all. How much is it? without enough flow you will always battle algae. the recommended range is usually around 25-30 times your total tank capacity unless you are doing SPS or have other special needs.