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Tag Archives: Water Temperature

Submersible aquarium heater inside a freshwater planted tank

Equipment Guides

Aquarium Heater Guide: Sizing, Placement, and Safety

Quick answer: Most tropical freshwater fish need water between 24–27°C (75–80°F). Size your heater at roughly 1 watt per li...

A clip-on fan blowing across the open surface of a freshwater aquarium to cool it in summer

Troubleshooting

How to Cool Your Aquarium in Summer Heat

Why aquarium heat is really an oxygen problem, how to cool a tank with fans and aeration, emergency heatwave steps, and which fish and plants handle heat best.

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