Thanks chris, I have HTP wicks too ... I have to tell you coreless works best with the 415. The others shroom so bad. I did get some samples of LX can't remember at the moment which I used or if I even tried them. I have to check my notes. I recently purchased all the CDNs heard such great things about them . Crazy . When things are working I just love it . when they are not working NOT SO MUCH....