Just use dirt/sand mix , its the best thing for them. They will be able to use it to make borrows and impaction shouldn't be a problem if husbandry is correct.
I still think you should be getting a smaller species to fully understand monitors then move up to the big ones later.
Trust me you would not want a bite from a 5+ foot lizard and now for caging where is a 12ft cage going to go when it reaches 5+ feet in the first year and the 12ft cage is just a bare min cage for an adult.
As for humidity the cage read this
I would re think your decision about getting a black throat
Bryan
I still think you should be getting a smaller species to fully understand monitors then move up to the big ones later.
Trust me you would not want a bite from a 5+ foot lizard and now for caging where is a 12ft cage going to go when it reaches 5+ feet in the first year and the 12ft cage is just a bare min cage for an adult.
As for humidity the cage read this
The humidity is variable in a proper cage. ItÃ?¢ââ??‰â??¢ll be dryer (like 30%) by the hot basking areas and should be very high (90%) deep in the moist dirt you provide. You cannot answer that with a single number.
Krusty
I would re think your decision about getting a black throat
Bryan