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A small school of fish swimming over driftwood and dense aquatic plants in a planted aquarium

Equipment

Choosing gear, without the guesswork.

You don't need to memorise product specs to kit out a tank. You need a few rules that hold across every brand: how much light your plants can use, how much filter flow to aim for, whether you actually need CO2, and what size heater to run. That's what these cover.

Photo: Pinamon· Unsplash