With an aquarium calculator, you can approximate heating unit size and temperature targets

https://fish-tank-size-calculatoryrtf584.cavandoragh.org/5-reasons-to-consider-being-an-online-fish-stock-calculator-and-5-reasons-you-shouldn-t

With an aquarium calculator, you can approximate heating system size and temperature targets. Make much safer options for tropical, cold-water, or planted tanks.