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Fishkeeping, properly explained.
Step-by-step guides, species profiles and water-chemistry tools — from cycling your first tank to breeding.
Explore The Aqua Guide — each figure links to the section it counts
Explore Aquatic Life
Every species we have written up, with the numbers that decide whether it suits your tank.
Acei Cichlid
Pseudotropheus sp. "acei"
Easy
Adolfo's Corydoras
Hoplisoma adolfoi
Moderate
African Butterfly Cichlid
Anomalochromis thomasi
Easy
African Butterflyfish
Pantodon buchholzi
Moderate
Angelfish
Pterophyllum scalare
Moderate
Auratus Cichlid
Melanochromis auratus
Moderate
Bala Shark
Balantiocheilos melanopterus
Easy
Banded Leporinus
Leporinus fasciatus
Moderate
Banded Rainbowfish
Melanotaenia trifasciata
Easy
Bandit Cory
Hoplisoma metae
Moderate
Banggai Cardinalfish
Pterapogon kauderni
Easy
Beckford's Pencilfish
Nannostomus beckfordi
ModerateGuides, Tools and Community for Every Fishkeeper
Everything the site does, in one place.
Aquarium Calculators and Planning Tools
Size a tank, dose a fertiliser, plan a build.
Plan and build your tank
Size the tank, substrate, hardscape and sump before you buy.
Equipment and running costs
Heating, lighting and CO2 — and what it all costs to run.
Water quality and maintenance
Keep parameters in range and your dosing right.
Reef and marine chemistry
Mix saltwater, read salinity and keep alkalinity, calcium and magnesium steady.
Choosing and caring for fish
Stocking levels, tank mates, names and feeding.
Fish health
Work out what is wrong, then treat it safely.
Latest Guides and Community Discussions
Newest from the library and the forum.
Latest Text Guides
Newest 6 guides
Popular Videos
Most watched
Latest Community Posts
Newest 6 discussions
Why Aquarists Use The Aqua Guide
Written by hobbyists
Every guide is written and reviewed by working aquarists, not scraped copy.
Calculators grounded in real bioload
Stocking and dosing tools built on actual species data, not rules of thumb.
A moderated community
Real answers from other fishkeepers, not an unmoderated forum free-for-all.
Get Answers From the Aqua Guide Community
From water chemistry to stocking questions, our community and FAQ cover the problems aquarists run into most.