thanks for all the input! I will have to see when my Koralia Nano's arrive if they are Evos or not. I bought them on Ebay and the description wasn't that great...come to think of it, 9 times out of 10 I wouldn't have bought the item because of the lack of description, but it was from a seller with 100% positive feedback and over 1000 ratings. If I get the Evos I will look into a wavemaker setup, if not, then I just run the Nano's as-is.