So I just purchased a new T5HO 36" by Zoomed and it came along with a UVB 10 bulb. It is placed on the top of my 40gal national geographic tank at the back end of the tank. I also placed a very large Java wood that's very thick and about 8 inches high and about 2-2.5 foot long. The tank measure 17 inches high. Now, I was wondering if you guys out there like to leave the screen on the tank or off knowing that the screen will filter the UVB and also reducing the heating lights? I personal like to leave the screen off but wonder if that is a good or bad idea? By the way, the humidity in my tank is 30 and the heat is around 82-85degree ( zoomed 100w) and my guys are about to turn 2 years of age in April of 2017...thanks for all the help!!