A basking point should be installed which should have a temperature of eighty-nine to ninety-five degrees Fahrenheit and the total air temperature should be at least eighty degrees Fahrenheit.
Different temperature should be assigned on different parts of the cage to allow regulation of body temperature for your giant iguana pet.
You can use mercury vapor lamps or fluorescent tubes in this kind of situation though some pet shops may recommend the use of hot rocks. But veterinarians are definitely against this idea. Hot rocks can burn your giant iguana’s skin and can cause wound which would lead to infection and death.
The humidity of the cage should also be taken into consideration. A sixty-five to seventy humidity rate should be observed for a proper iguana cage. You can have this by installing a humidifier into the cage or if you find too expensive you can just manually spray water on the cage a few times everyday.
You can also try to put a large bowl of water on the cage so that it can add up to the humidity inside the cage.
Lighting is also essential so make sure that your cage has the proper lighting in order for your giant iguana to survive.
An iguana needs a good dose of UVA and UVB lights. This is because UVA lights kindle their natural behavior and UVB on the other hand helps them in producing Vitamin D3 which is an essential component of their digestion process.
The most cheap and accessible way to get this UV rays into your giant iguana’s body is by exposing them to sun rays regularly or by building their cage near a window where sunlight is abundant.
It might be quite hard for you to be able to build such a complex man made biodiversity on your own place but these are essential needs for you giant iguana to survive under your captivity.
So this is a matter of life and death, if you think that you cannot provide the listed requirement for your iguana then you should think twice and lay out your terms and reconsider your option about owning a giant iguana.