Thats a really good size tank for a youngster like that.
Plent of room to grow.

But I would recommend getting a Hide for it, my girls are alot less jumpy when they have somewhere to get away to for a bit.
Also you could put a limb or something in there and it would be nice.

I personally prefer to keep my RTB w/ astroturf.. looks great, and very simple to clean... and you dont have to worry about them burying themselves and possibly getting very small pieces of shavings/sand or anything like that down their nostril area lol.

I have a tank topper on my youngest RTB Isabellas tank... and connected her vines and stuff in there and she absolutely loves it! Red tails love to be able to climb and stuff, so just keep that in mind, plus it looks great too!

Other than that, thats a gorgeous young one! Those colors are going to look great when its older