Australia's Ultimate Tropical Fish & Aquarium Resource
Learn, Calculate, Plan and Build Better Aquariums.
Featured Aquarium Tools
Fifteen free, instant calculators to plan and maintain a healthy aquarium.
Aquarium Volume Calculator
Calculate the exact volume of your tank in litres and gallons from its dimensions.
SetupFish Stocking Calculator
Estimate a safe stocking level for your tank to avoid overcrowding.
StockingWater Change Calculator
Work out how many litres to change to hit your target percentage.
MaintenanceAquarium Heater Calculator
Find the right heater wattage for your tank size and room temperature.
EquipmentFilter Flow Rate Calculator
Check whether your filter turns over the tank enough times per hour.
EquipmentAquarium Lighting Calculator
Estimate lighting needs for low, medium or high-tech planted tanks.
PlantsFish Species Directory
Care guides across 14 categories — from bettas to marine fish.
Betta (Siamese Fighting Fish)
Betta splendens
The iconic Siamese fighting fish: stunning colour, big personality and easy care in a heated nano tank.
Neon Tetra
Paracheirodon innesi
A dazzling red-and-blue schooler that defines the classic planted community tank.
Harlequin Rasbora
Trigonostigma heteromorpha
A hardy copper-coloured schooler and a staple of the nature aquarium.
German Blue Ram
Mikrogeophagus ramirezi
A jewel-like dwarf cichlid with electric-blue spangling and gentle ways.
Fancy Goldfish
Carassius auratus
A hardy, long-lived cold-water classic that needs far more space and filtration than most people expect.
Guppy
Poecilia reticulata
The endlessly colourful livebearer that breeds readily and suits beginners.
Aquarium Setup & Aquascaping Guides
Beginner Aquascaping Guide
Learn the core principles of aquascaping and how to design your first planted tank.
Nature Aquarium Guide (Takashi Amano Style)
The philosophy and techniques behind the Nature Aquarium style pioneered by Takashi Amano.
Dutch Style Aquarium Guide
How to create the colourful, terraced plant displays of the classic Dutch aquascaping style.
Iwagumi Aquascaping Guide
Master the minimalist, rock-focused Iwagumi style and its strict compositional rules.
Latest Blog Posts
Aquarium Tank Sizes Explained: 2ft to 6ft in Litres, Dimensions and Weight
How big is a 3ft, 4ft or 5ft fish tank in litres, what does it weigh full, and…
How Many Fish Can You Put in a Tank? A Simple Stocking Guide
Worried about overstocking? Here is a clear, modern way to work out how many fish your aquarium can…
Why Is My Aquarium Water Cloudy? White, Green and Brown Water Fixed
Cloudy aquarium water is common and almost always fixable. Here is what white, green and brown water each…
How to Get Rid of Algae in Your Aquarium (and Keep It Away)
Algae is the most common aquarium frustration. Here is what causes it, how to remove each type, and…
Fish Disease Guides
The most common aquarium parasite, appearing as grains of salt across the… 🩺 Fin Rot
A bacterial infection that frays and erodes the fins, usually triggered by… 🩺 Velvet
A parasitic infection that coats fish in a fine gold or rust-coloured… 🩺 Dropsy
A symptom, not a single disease — fluid build-up causing a swollen…
Get Aquarium Tips in Your Inbox
Join Australian fishkeepers getting our best care guides and tool updates.