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.

Wallaciia notophthalmus is a dwarf pike cichlid with striking fins and plenty of personality. Learn about water parameters, feeding, tank setup, compatibility, and breeding.

Meet the Moose Face Loach, a peaceful sand-burrowing oddball with some specific care needs. Learn about water parameters, feeding, tank setup, and tank mates.

Four Spot Splash Tetras (Pyrrhulina spilota) are an uncommon South American fish with plenty of personality. Learn how to keep, feed, and breed this fascinating surface-dwelling species.