Browse all entries
Every published model, bias and explainer — cross-linked and cited.
Betta (Siamese Fighting Fish)
A hardy, long-finned labyrinth fish that breathes air — best kept alone in a heated, filtered tank of at least 19 litres (5 US gallons).
Species profileCherry Shrimp
A tiny, peaceful dwarf shrimp that grazes algae and biofilm — colourful, easy to breed and perfect for nano planted tanks.
Species profileCorydoras Catfish
Peaceful, armoured bottom-dwelling catfish that forage the substrate — social, hardy and best kept in groups of six or more.
Care guideCycling a New Aquarium
How to establish the beneficial bacteria that make a tank safe for fish — the single most important step before adding any livestock.
Care guideDoing Regular Water Changes
The core maintenance routine — how much water to change, how often, and how to do it without shocking your fish.
Care guideFeeding Your Fish Properly
How much and how often to feed — and why overfeeding, not underfeeding, is the more common danger to fish and water quality.
Species profileFreshwater Angelfish
A tall, graceful cichlid that needs a deep tank — a beautiful centrepiece, but semi-aggressive and a threat to very small fish.
Species profileGuppy
A hardy, colourful livebearer that breeds readily — beginner-friendly, but males and females together will multiply fast.
Species profileKuhli Loach
A slender, eel-like nocturnal loach that sifts the substrate — peaceful, social and best kept in groups over soft sand.
Species profileMystery Snail
A peaceful, plant-safe aquarium snail that scavenges leftover food and algae — a hardy cleanup helper for the community tank.
Species profileNeon Tetra
A tiny, iconic schooling fish with an electric blue-and-red stripe — peaceful, soft-water and best kept in groups of six or more.
ConceptpH in the Aquarium
The measure of how acidic or alkaline your water is — and why keeping it stable usually matters more than hitting an exact number.
Care guideSetting Up a Planted Tank
What live aquarium plants need — light, nutrients and substrate — and why starting with hardy, low-light species is the reliable path.
ConceptThe Nitrogen Cycle
The bacterial process that converts toxic fish waste into safer compounds — the invisible engine that makes an aquarium livable.
ConceptThe Stocking Rule
How to judge how many fish a tank can hold — and why the old "inch per gallon" guideline is only a rough, and often misleading, starting point.
ConceptWater Hardness (GH & KH)
The dissolved-mineral content of your water — GH affects fish, KH buffers pH, and together they explain how stable your tank really is.
Care guideYour First Aquarium: A Beginner Setup
A start-to-finish plan for a first freshwater tank — why bigger is easier, what equipment you actually need, and the order to do things in.
Species profileZebra Danio
An extremely hardy, fast-swimming striped schooling fish — tolerant of cooler water and ideal for a first cycled community tank.