We hate to break the news, but poor water quality is the leading cause of fish death in aquariums. Once you’ve decided on the ...

With proper care, these fish can grow up to 12 inches long and live for decades. A single goldfish requires at least a 20-gallon tank, with an additional 10 gallons for each extra fish.

Goldfish are among the most popular aquarium pets in the world, loved for their bright colors, peaceful personalities, and relatively low-maintenance care. But when it comes to keeping them ...