Make your aquarium pop with a background and instantly give it a more polished, natural look. Beyond style, backgrounds also hide cords, filters, and wall distractions while helping your fish feel more secure in their environment. The color you choose should add depth and tie the whole aquarium together - dark tones make fish and plants stand out dramatically, while lighter or natural shades create an open, airy feel. For something simple, stick-on colors are quick to apply, or if you want to get fancy, 3D backgrounds that mimic riverbanks and rock walls can transform your tank, just keep in mind they take up a little space inside.