The good and bad thing about nano aquariums is their small size. On one hand, they can fit anywhere, are easy to take care of, and can be fully stocked in a matter of no time. On the other, their water parameters are less stable, the livestock choices are severely restricted, and most tanks aren’t fully equipped with all of the proper filtration and lighting hardware. Because of this, the tanks have a widely varying following that includes beginner aquarists who are looking for something inexpensive and easy, as well as seasoned vets who want to house a very specific fish or invertebrate. The fortunate thing about all of the downsides mentioned is that the aquarium’s capabilities and water capacity can be augmented with key upgrades and a little DIY know how.