Wow. Look fantastic. No complaints from me on the hardscape or the planting. Very jealous lol.
What are you using for your backlight? I made a background for my 20L which I am not using around an old fixture which was too much light, plus it is limited to 3 bulb colors, 2 not so noticeable with the lights on (coralife t5no 30in fixture, nobody else makes the bulbs). I get algae on the back glass on past setups and it just isn't what I want. Would love to know more info as I want to do another back lit tank again, may get an artist friend to do some realistic clouds and whatnot.