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

https://fish-tank-size-calculatorfbyx670.quillnesty.com/posts/the-reason-why-adding-a-gallon-calculator-fish-tank-to-your-life-s-routine-will-make-the-change

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