Neon tetras are one of the most popular freshwater aquarium fish, but they are more sensitive than many beginners realize. Learn what neon tetras truly need to thrive, why they often struggle in new tanks, and how to create a stable, healthy environment for your school.

Thinking about adding “just a few more fish” to your 20 gallon tank? Before you do, here’s what actually determines whether your aquarium can handle it and why balance matters more than math.

More light doesn’t mean healthier plants. Discover how excessive lighting fuels algae and why most freshwater aquariums thrive with just 6–8 hours a day.