I think you mis understood my post I was bouncing around on a bus writing so forgive me this. I did not mean your room smelled but the enclosure should not. Tanks by the rules of air movement do not vent well. A fully open top will only vent about 60% so covering up 1/2 depending on how you do this could reduce this to less than 10%. The best way is leaving the both ends open and covering the centre promoting air movement. Remember 7 times the height on the horizontal will have poor air movement. Most tanks that means the whole bottom is poorly ventilated. Why I'd use side turned it allows low vents so only 5-6 inches in suffer from lower ventilation levels.

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Disinfecting removes smells. Many fail to follow the instructions on the particular chemical of choice so it does not disinfect at all. Following the instructions (duh) they work well. Odours signal one or both of these issues there should be no smell at all but the smell of the substrate. Nothing ever should smell close or 'basement, old, musty' smell usually this usually signals poor ventilation.