United States readers have the chance to win one of five biOrb bowls in an exclusive competition.
We have five of the popular biOrb bowls available to give away to Practical Fishkeeping website members in a special competition exclusively for our US-based readers.
Reef One told Practical Fishkeeping: "Whether you love fish, need to de-stress, or just want to brighten up your home or workplace, a Reef One biOrb fits the bill.
"It's a high-tech aquarium that combines the 360 visual appeal of a traditional fish bowl with the technology of a modern aquarium. Available in silver and black, it's a smart and vibrant addition to any room - and even doubles as a designer light!
"The 30 litre acrylic globe features an efficient, easy-to-change cartridge filtration system that keeps water crystal clear and provides a healthy habitat for fish. It comes ready to run; just add water, plants and fish as desired. Includes air pump, water chemical, fish food, halogen light, filter cartridge."
To enter the competition you need to register for free access to the site, then go to the competition page and answer a simple multiple choice question.