Understanding the Nitrogen Cycle

Reef keeping has a reputation for being difficult and expensive. Some of that reputation is deserved. Here is what you actually need to know before you start.

The Iwagumi style strips aquascaping to its essentials — stone, carpet plants, and negative space. It is harder than it looks, and more rewarding than almost anything else in the hobby.

Betta fish are sold in tiny cups and kept in vases. Neither is appropriate. Here is what a betta actually needs to thrive.

A test kit is only useful if you know what the numbers mean. Here is a plain-language guide to the parameters that matter most.

Ten gallons is the most popular tank size for beginners. It is also one of the most misunderstood. Here is how to set one up for success.