I have a black background and I LOVE it. It really does help the colors in the tank pop. Rocks ... substrate, fish plants etc...!
Granted ... blemishes on the glass will show up more .. but that just lets me know where I need to do some scraping
In your case ... sounds like you have some colorful fish ... so I can only imagine how good they'd look
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.