Hello. I was babysitting two N. Uro's for a friend. Two males living together. I keep many other reptiles but had never had Uro's before. Anyways he decided I could keep both the Uro's for good. I asked him to find one of them a home, and I would keep one since I wasn't comfortable housing them together or getting another set up. lol. 
So now I have just the orange male for good. Currently he is in a 40 gallon tank, but will be moving to a 90 gallon in a few weeks.
What is the best substrate and amount of substrate for this size aquarium and Uro? Right now he has a few inches of play sand. Id' like to stick with this just deeper.
Secondly, I have been doing lots of reading since getting them, but haven't found much on Nigerian Uros specifically. Any good reading you can give?
thanks!




