I saw one of my friends have one of these filters on a freshwater tank and it looked very nice. Are these good for marine tanks too? I just have a HOB filter on my tank now and the Rena looks like it would be a lot more efficient than mine. What do you think?
http://www.aquariumguys.com/filstarxp1.html
http://www.aquariumguys.com/filstarxp1.html