Freshwater aquariums · all levels
Get your freshwater aquarium right, at every step.
Step-by-step guides, honest gear comparisons and clear fixes for common problems — to keep your tank healthy and your fish thriving.
Browse by topic
Everything for your freshwater aquarium
Pick the topic you need — setup, problems, gear, aquascaping or fish. Each section gathers our guides so you can find your way.
The guide
The freshwater aquarium guide
The whole journey, from setup to fish.
Start here →
Setup
Setup & cycling
Cycling, filling, tank size: the foundations.
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Problems
Problems & fixes
Algae, cloudy water, green water… solved simply.
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Gear
Gear & comparisons
Filters, heaters, lights: for every budget.
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Aquascaping
Aquascaping & decor
Natural layouts: plants, soils, rocks, wood.
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Species
Species care
Which tank, how many, who to mix.
→Latest guides
Gear
Best aquarium heater
Read the guide → Aquascaping
Best aquasoil / nutrient substrate
Read the guide →
Aquascaping
Aquascaping for beginners: the basic tools
Read the guide →
Species
How many Neocaridina to start a colony in 30L?
Read the guide →
Species
Can guppies and shrimp live together?
Read the guide →
Species
Corydoras: how many in an 80L and what substrate?
Read the guide →Not sure which tank to get?
You often pick the tank based on the fish you want.