Just my 2 cent, the placement of the fake plants are a little too organized for my taste( nothing wrong with it if that is what you were going for). I think if you can find a nice size driftwood and plant the fake plants around it, might give your tank a more natural feeling. I think the tank looks nice as is, it is just that I like tanks that look natural.
Cant have driftwood in it as I'm scare my arowana All hurt itself. On top of that the drift wood I get around here are too small to make much of a difference most of them are around 10 inches and in a 125 I didn't think it'll look good
The stock is 2 baby arowana a tiger shovelnose a gar and a few feeders
As for the fake plants the only fake ones are the 2 big ones ment to give the arowana some comfort but they're bigger now so I took those out the rest are all real plants