just a question, I remember reading about your light way back for your tank. You mentioned that you couldnt achieve pearling. Have you? I'm curious because I almost got the same fixture for my 40 breeder. But I ended getting two 48" dual strip T5's for $50 bucks. The bulbs are only 28watts each but, it totals 112 watts together. I'm currently using two 10000K's and two 6700K's. The moment I put them on the pearling began. I was beginning to regret the getting the lights I went with instead of the one you have. Also I've got pressurized and bubbling just a bit over 4 bubbles every second.