That's Varanus niloticus, not Varanus ornatus. There are too many rows of oscelli on the back between the shoulder and rear legs. There are only 3-5 rows on Varanus ornatus. Also the tongue is dark. Ornates have a pink tongue.
Nice looking little monitor, though.
I would get it out of that tank ASAP if you plan on taming it. Coming in from above is going to get you the "Holy crap! - Here comes a swooping predator!" reaction and your little gem will be tucked away in its hide before you can say "What the..."
Once your monitor is trusting of you, there is no better feeling in the world.
Oh, by the way, what are you going to house it in in 3 months when it has outgrown that tank?
Chris