We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Sabrina Imbler We’ve updated links throughout this guide. Watching fish swim, ...

Overcrowding is the number one reason for low oxygen in an aquarium. The rule of thumb for stocking a tank is one inch of ...

While aquariums are beautiful and full of life, they get dirty pretty quickly. Over time, the water gets cloudy and sometimes even a bit green, which is due to residue from fish food, and sometimes, ...