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

https://fish-tank-capacity-calculatorwtij340.almoheet-travel.com/11-faux-pas-that-actually-are-okay-to-make-with-your-aquarium-measurements-calculator

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