An aquarium hobby can take up a lot of space, but small and nano aquariums offer options that can work for a small space. In this guide, we’ll show you exactly what you need to keep your fish healthy ...

Small tanks, or "nano reefs," are under 30 gallons, and make it affordable for fish-lovers to own a reef aquarium, says Acland, who notes that large-scale models are very expensive. "The nano reefs ...