So it's been a while since I've posted on here and I have a couple questions about a UV sterilizer that my friend at the LFS suggested I get. First of all, I'm going to start up a 50 gallon freshwater planted tank with CO2. He suggested that I get the Turbo Twist for my tank because he said it will keep algae from taking over and I will have cleaner water. He told me that I could hook up the sterilizer inline with my Rena XP3 but it would give me less flow. Another option would be to buy a powerhead to pump the water out of my tank and then I could simply have the return hose come back in and hang in the tank (sounded real ghetto to me), or I could buy another powerhead to attach to return hose to. He showed me the setup on one of their tanks there in the store and he said that they leave it on all the time. I wasn't sure about this because Lotus posted in another thread that UV sterilizers should only be used for treating ich or green water. I guess what I want to know is if it's worth it. I can pick up the 9W version for $52 bucks and some change (yay for coupons). Has anybody had any experience with this UV sterilizer and how would you suggest I hook it up?