The room is 8x7x7 and is pretty sealed, has a controller that keeps it 1200-1500 when the lights are on. Went through a tank in like 11 days, is that normal?
Your room isn't as sealed as you think . I used to have a 20lber in a 10x12x9 that used to last me 10 days. 8 at the end. Seal up!