Everything You Need for a Thriving Aquarium

118 care guides, 41 equipment reviews, interactive calculators, and expert advice for freshwater aquariums — all free.

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Everything you need to build and maintain a thriving aquarium.

Care guides for bettas, goldfish, tetras, cichlids, shrimp, snails, and 50+ species.

Java fern, anubias, carpet plants, floating plants, and 29 species with full care guides.

Filters, heaters, lights, substrate, CO2, test kits — 41 products reviewed.

Dimensions, stocking, and setup guides for every tank from 3 to 125 gallons.

Identify and treat ich, fin rot, dropsy, swim bladder, velvet, and more.

Every algae type identified with causes, fixes, and best algae eaters.

Quick links to our most-read care guides.

Our step-by-step beginner guide covers everything from choosing your first tank to adding fish — no experience needed.