Nice looking tank and stand. I am currently designing a 5.5 nano. I plan on doing the same type of enclosure you used, but I think I am going to use a 2.5 as a sump on the back of it. I dont know if I should drill the tank or use a hob overflow box to get the water into the sump, then use a pump to pump it back into the main tank. I plan on running pcs for light. Tank looks great. Jon