I'll never be able to afford a proper reef tank, but I love the way they look (who doesn't?). Would it be tacky to decorate my tetra/live bearer tank with fake corals and reef background? Please be honest, I can handle it. Right now I have a Halloween theme and it's time to switch it up. 20 gallons. 1 adult gold twinbar platy, 1 baby gold twinbar platy, 1 juvenile red Mickey Mouse platy, 7 neon tetras, 5 black neon tetras, 6 glowlight tetras, 3 baby guppies (they haven't developed their colors yet), 1 gold mystery snail, 1 blue mystery snail, 1 banjo catfish (spends most of the daytime under a rock). None of the fish really school much anymore. I guess they've gotten more comfortable with one another since being introduced to the tank. The downside is they've lost that sense of visual appeal schooling brings.