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

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, ...

A clean fish tank looks great and provides a nice home for your fish. Over time, chemicals like nitrates can build up in your fish tank, which leads to a cloudy appearance. Even if you use a fish tank ...