DUSTYFISH
Aquarium guides, fishkeeping tips, and the calculators behind a healthy tank.
From sizing your tank and checking your stocking to picking the right heater, planning a water change, measuring your substrate, and dosing aquarium salt, DustyFish pairs free hands-on fishkeeping calculators with practical guides and a richly illustrated museum. Keep healthier fish, one clear tank at a time.
Aquarium Tools & Calculators
Free calculators for every fishkeeper — aquarium volume calculator, fish stocking calculator, heater wattage calculator, water change calculator, substrate calculator, and aquarium salt dose calculator.
Aquarium Volume Calculator
Work out how much water your tank really holds from its dimensions — in US gallons, litres, and cubic units — plus a net volume that allows for substrate, décor, and headspace
Fish Stocking Calculator
Check whether your tank is understocked, well stocked, or overstocked using the inch-per-gallon rule — add each species and count to see your total stocking level at a glance
Aquarium Heater Calculator
Find the right heater wattage from your tank volume, room temperature, and target temperature — rounded up to the nearest standard heater size you can actually buy
Water Change Calculator
Work out how much water to remove for a partial change and how much dechlorinator to add to the fresh tap water going back in — for a safe, consistent maintenance routine
Aquarium Substrate Calculator
See how many pounds and kilograms of gravel or sand you need to cover your tank's base to the right depth — enter the footprint and depth and get the weight to buy
Aquarium Salt Calculator
Get the right dose of freshwater aquarium salt for your tank — general tonic, stress relief, or an ich treatment level — in tablespoons and grams based on your water volume
Aquarium & Tropical Fish Museum
Wander an immersive museum of the home aquarium — the freshwater fish from betta to discus, the aquarium plants of a planted tank, the equipment that keeps the water alive, and the corals and clownfish of the marine reef, each in its own gallery, so you can get to know the world of fishkeeping: the fish, the plants, the gear, and the craft of a healthy tank.
Tour the museum →From the Journal
Fresh guides on freshwater fish and fish care, tank setup and water quality, aquarium plants and aquascaping, plus practical tips for keeping a healthy, thriving aquarium.
Quick Freshwater Fish Solutions Under 30 Minutes
Quick Freshwater Fish Solutions Under 30 Minutes Freshwater fish inhabit lakes, rivers, ponds, and streams across every continent except Antarctica. With over 16,000 known species, they play vital roles in…
Freshwater Fish Best Practices 2025
Freshwater Fish Best Practices 2025 Fish species that thrive exclusively in freshwater environments are essential components of aquatic ecosystems worldwide. From small streams to vast lakes, these organisms play critical…
Freshwater Fish for Small Spaces
The Hidden World Beneath the Surface: Exploring Freshwater Fish Ecosystems In the quiet corners of rivers, lakes, and ponds across our planet, an extraordinary world thrives unseen by most. This…
Common Freshwater Fish Mistakes to Avoid
Common Freshwater Fish Mistakes to Avoid Freshwater fishing is an activity enjoyed by millions around the world, offering both recreation and sustenance. However, many anglers make avoidable mistakes that can…
Freshwater Fish Step-by-Step Tutorial
The Secret World Beneath Freshwater Surfaces: A Dive into Aquatic Life Freshwater ecosystems are teeming with life that often goes unnoticed by those who pass by lakes, rivers, and ponds….
Professional Freshwater Fish: Advanced Techniques
Freshwater Fish: Unlocking the Secrets of Aquatic Diversity and Conservation Freshwater ecosystems are among the most biologically diverse habitats on Earth, teeming with an astonishing array of fish species that…
Keep Learning
Practical know-how on cycling a new tank, planning water changes, and choosing equipment, plain-language explainers on stocking, heating, and water chemistry, and seasoned tips for first-time and experienced fishkeepers alike — everything you need to dig deeper and keep thriving fish.
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