Love the tank, I have one similar, but started with Tin Foil barbs... ( so some big fish ) I was worried they would eat my Panda Garra's, as those came in tiny ( about 1/2 inch ) but the Tin Foils are tolerant of everyone, & soon found them sharing food with the tiny pandas, I have 2 varieties of Hillstreams, as well, & love them & the Pandas... my tank also has Denison Barbs...
I wonder if there are sub species of the Panda Garra's ??? I have 5 of them... 4 of them are a medium grey, & one is literally black... they are both striped traditionally, but the 4 grey ones hang within about 1/3 of a 55 gallon tank, of each other, but the black one always stays on the opposite side of the tank, rarely interacting with the lighter color ones, all are eating good, & growing rapidly, in a month, all have put on an inch in length, so they are all currently about an inch & a half long right now...