With an aquarium calculator, you can estimate heating system size and temperature level targets
https://aquarium-weight-calculatormqys655.rivetgarden.com/posts/5-laws-that-can-help-the-how-many-gallons-does-my-fish-tank-hold-industry
With an aquarium calculator, you can approximate heater size and temperature targets. Make safer choices for tropical, cold-water, or planted tanks.