Undergravel filters used to run almost every aquarium in the hobby. Then somewhere along the way, they became the aquarium equivalent of wood paneling and shag carpet. But were they actually bad… or did the hobby simply move on to more complicated and expensive equipment? A nostalgic, honest look at one of fishkeeping’s most forgotten filtration systems — and why the old hobbyists may not have been completely wrong.

Most nano fish lists are the same recycled picks—but these aren’t that. From oddball tetras to tiny predators and underrated livebearers, these are the nano fish that actually do something. If your tank feels boring, this is where you fix it.

Trying to attach aquarium plants to driftwood? Here’s the easiest method that actually works—plus common mistakes to avoid and the best plants to use.

Inpaichthys luizae (Black Arrow Tetra) is a stunning new schooling fish from the Brazilian Amazon, prized for its bold black lateral stripe, peaceful nature, and exceptional planted tank appeal. Learn how to care for this exciting species, including aquarium setup, diet, water parameters, and ideal tank mates.

Aequidens diadema (Royal Acara) is a stunning South American cichlid known for its metallic blue spotting, flowing fins, and commanding presence. Learn how to care for this incredible centerpiece fish, including tank setup, diet, behavior, and breeding.

Steatocranus tinanti (Slender Buffalo Cichlid) is a unique African river cichlid known for its rock-hopping behavior, strong personality, and cave spawning habits. Learn how to care for this fascinating species, including tank setup, diet, and breeding.