I have a 29G Nano Cube and currently run Zeolite in my filter. I was wondering how many of you run Zeolite in your filters? Also is there something better on the market to use instead of Zeolite? Such as Seachem Purigen, or Chemi-Pure (<---Is this just carbon?) I also run RowaPhos which I love and will use until I upgrade and start using a sump. My LFS owner swears by Zeolite. He runs it in all his Frag tanks which are all beautiful and also his massive display tank full of flawless SPS corals. It seems to work great for him and also has worked well for me, so far. I tested my Nitrates last night and they were a bit high, so I changed out the Zeolite in my filter because it has been awhile since I replaced it. I do about a 33% water change every two weeks. I'm going to test my Nitrates in a few days to see if the new Zeolite I put in has helped lower them at all. In the meantime I was wondering what you guys use and what you swear by. I know frequent water changes are the best way to lower Nitrates, but it's always nice to have some backup in assisting the process.