oh brilliant thank you
also i have another question :p the vivarium we have is similar to this one Vivexotic Viva Terrestrial Vivarium Medium
except there isnt a airflow vent at the top, it has the aluminium rails at the front only i was thinking surly that is not enough airflow? i read that its good to have airflow at the top and the side (cool end) i just dont see how these rails can allow enough air in and out.
so would it be necessary to add some small holes at the top/side myself or would that be a completely silly idea :p