Its a nice clean look and you have a nice system. When the plants grow out on the right side, it will look even better.
Couple things, sand isn't the preferred substrate, what made you go that way? A darker background might set the tank off a little better. If its not that big a hassle, you could try some black material for the background. I have a dark blue foil and people are telling me to go with black. Its whatever you like though, the tank still looks great.
Free the Carbon
55 gallon 2 wpg planted dosing excel with guppies, and shrimp
90 gallon mixed reef with clowns, gobies, and cardinals
150 gallon african cichlid tank with clown loaches