YOUR EVERYDAY FIELD GUIDE

Discover the world on the other side of the glass.

Fishes / Getting Started

Little Worms in Your Saltwater Tank: What They Are and What to Do About Them

Spot a few thin, pale threads wriggling along the glass or poking out of the sand and the first instinct is to panic. Take a breath. Most of the tiny worms that turn up in a saltwater tank are harmles

3 min read

Fishes / Getting Started

Lighting for Macroalgae and Corals in a Community Reef Tank

Freshwater aquarists talk about lighting requirements for live plants. Saltwater does not really have true aquatic plants in the display tank, corals and macroalgae are technically animals and algae,

3 min read

Fishes / Getting Started

How to Tell Male From Female in Aquarium Fish

Sexing fish matters for breeding, for managing aggression, and simply for understanding the animals you are keeping. Methods vary considerably by species, but a few broad patterns cover many of the fi

2 min read

Fishes / Getting Started

Meet Your Reef Tank's Cleanup Crew: Building a Natural Maintenance Team

Every functioning reef tank runs on more than filtration and water changes. A team of small scavengers and grazers, collectively known in the hobby as the cleanup crew, handles the ongoing work of eat

2 min read

Fishes / Getting Started

Getting Your Weekly Fish Tank Routine Right, Every Time

A full clean matters, but it is the smaller, weekly habits that actually keep a tank healthy between those bigger sessions. Most beginner problems, cloudy water, algae outbreaks, sick fish, trace back

2 min read

Fishes / Getting Started

The Marine Aquarium's Rarest Showstoppers: Unique Fish Worth Knowing

Tags: rare saltwater fish, unique marine fish, mandarin dragonet, peppermint angelfish, advanced aquarium

2 min read