UPDATE: As you guys know, I upgraded to a brand new 90 gal tank set up for my adult RES & she loves the extra room! In the last week & a half, I added a platform, large tree root, new Fluval 4 submersible filter, and Zoo med lamp for Sheba. The water level seems to be working out well, and I actually like having the aquarium canopy open since it gives her more air. I plan on adding a few rocks, but I will have to run out to some build sites to pick some up! In the meantime, she seems fairly happy & I think I got her basic needs under control. See pics below.