Tank Size Calculator
Calculate your tank's volume in gallons or litres from its dimensions. Supports rectangular, bowfront, and hex tanks.
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Free calculators, compatibility checkers, and beginner guides — everything you need to build a healthy, thriving aquarium.
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Aquarium Calculators & Tools
Accurate, easy-to-use tools built for every stage of your aquarium journey.
Fish Stocking Calculator
Estimate how many fish your tank can safely hold using the inch-per-gallon rule and surface area method.
Fish Compatibility Checker
Find out if your chosen fish species can live together peacefully based on temperament, water parameters, and tank size.
Walstad Soil Calculator
Calculate the perfect soil and sand ratio for a low-tech planted tank using the Walstad method.
Plant Recommender
Get plant suggestions based on your tank size, lighting level, and whether you use CO₂ injection.
Aquarium Pest Guide
Identify common tank pests like hydra, planaria, and snails — and learn how to safely remove them.
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Guides
Beginner Guides
Step-by-step articles to take you from first tank to thriving aquarist.
How to Cycle a New Fish Tank
Learn the nitrogen cycle and how to safely cycle your tank before adding any fish.
Read Guide →Choosing the Right Tank Size
Bigger isn't always better — find out which tank size matches your space and goals.
Read Guide →Best Fish for a 10-Gallon Tank
The best nano fish species for small tanks — peaceful, hardy, and beginner friendly.
Read Guide →Aquarium Water Parameters Explained
pH, ammonia, nitrite, nitrate — what they mean and what levels to aim for.
Read Guide →Low-Tech Planted Tank Setup Guide
Set up a lush planted tank without CO₂ injection or expensive equipment.
Read Guide →Common Beginner Mistakes to Avoid
The top mistakes new aquarists make — and how to avoid them from day one.
Read Guide →