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Fishes.

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370 guides · Page 23 of 62
A mesmerizing view of a school of fish swimming amidst lush aquatic plants in a freshwater aquarium.

Fishes / Getting Started

How to Add New Fish to an Established Aquarium Safely

Adding new fish to a tank that already has an established community is not simply a matter of releasing them in and hoping for the best. Done carelessly, it risks introducing disease, triggering terri

2 min read

Close-up of a pristella tetra fish swimming amid vibrant green aquatic plants.

Fishes / Habitat

Rummy Nose Tetra: A Living Water Quality Gauge

The rummy nose tetra, most commonly the species Hemigrammus bleheri sold in the trade, is instantly recognisable by its bright red head and a tail striped in black and white. It comes from the Amazon

3 min read

Vibrant red sea urchin with spiky texture in natural underwater environment, showcasing marine beauty.

Fishes / Breeds

Sea Urchins for the Indian Reef Tank

Sea urchins rarely get the attention corals and fish do, yet a healthy urchin does more unglamorous cleanup work than almost anything else in the tank. They graze constantly, they cannot be overfed th

4 min read