There's nothing so exciting as starting a new fishkeeping project, and it all starts with the tank itself. Whether you're looking for a compact aquarium that can fit comfortably onto your desktop, or something small enough that maintenance won't take up too much of your time, our collection of 40 litre fish tanks has something to suit your needs. Featuring models from some of the most respected brands available, including the technologically-advanced biOrb, and beginner-friendly Superfish, browse the full range below to find a 40L aquarium to further your hobby.