He does not need a night drop. Try to keep his belly heat around 31-32*C, cool side at 25-26*C.
Otherwise, he's young and needs time to settle in. He's not feeling secure yet. Give him a few days before feeding, and at least two weeks before handling other than the minimum you have to do to change his water and clean up his messes.
am of to bed soon but i have the tank hooked up to a digitel thermostat an kt needs a night temp and day temp is what am saying so it normoly runs 30 c at 8am till 8pm then of all night also will he be ok in a 3 foot tank any advice is needed atm