The designers at biOrb have put together a collection of decor kits that make decorating your biOrb easier. The biOrb Decor Set - 15L Flower Garden contains some of our favorite aquarium decorations to bring your 4 gallon biOrb to life. Unique and vibrant designs and colors, paired with quality materials, make these biOrb decor sets unique. You will have a professionally designed aquarium in no time at all.