How many gallons can a 50 watt heater heat?

Heater capacity is usually measured in watts. The general rule of thumb is to have a capacity of approximately 5 watts per gallon of water. Therefore, a 10 gallon aquarium will need a 50 watt heater.

Aquarium Heater Size.
Aquarium Size Heater Capacity
50-60 Gallons 200 Watts
75-100 Gallons 250-300 Watts

How many gallons is a 50W heater?

Finding the Right Aquarium Heater Size
Aquarium Heater Size Guide
10 Gallon/40 Liter 50 watt 75 watt
20 Gallon/75 Liter 50 watt 150 watt
25 Gallon/100 Liter 75 watt 200 watt
40 Gallon/150 Liter 100 watt 300 watt

Is a 50W heater good for a 10 gallon tank?

Some hobbyists love to start with small tanks under 10 gallons. And if yours is a 10-gallon tank, you will need a 50-watt heater to keep the temperature right for the fish.

Is a 50 watt heater good for a 2.5 gallon tank?

That said, most modern heaters are pretty reliable (as long as you stick with the well-established brands) and a 50W shouldn’t generate too much heat too quickly for a 2.5-gallon.

How many watts is a gallon of heat?

A basic rule of thumb is 3-5 watts per gallon. To heat a tank thoroughly, and maintain that temperature, the heater must have enough power, i.e. wattage, capable of affecting the number of gallons in the tank.

Can a 50w heater heat a 20 gallon tank?

High wattage filters are best in large aquariums (from 75 gallons) and usually range anywhere from 250 watts. … That said, a 50 watts heater is adequate for a 20 gallons aquarium in a warm room (78° F), but the efficiency goes down in a colder fish tanks to only being useable in a 15-gallon fish tank.

Is a 50 watt heater for 5 gallon tank?

If your tank is 5 gallons then it’s entirely possible to use a smaller heater such as 25 watts. … However, a 50-watt heater is going to be able to heat a tank a lot better and a lot quicker than a 25-watt heater.

What size heater do I need for a 55 gallon aquarium?

What Size Heater for 55 Gallon Aquarium. A standard 55 gallon aquarium will require a 165-watt heater at a minimum. A heater this size will be sufficient if the difference between the aquariums temperature and the ambient room temperature is around 5 degrees Fahrenheit.

What size heater do I need for a 10 gallon tank?

Heater capacity is usually measured in watts. The general rule of thumb is to have a capacity of approximately 5 watts per gallon of water. Therefore, a 10 gallon aquarium will need a 50 watt heater.

What size heater do I need for a 30 gallon aquarium?

It’s generally recommended to use 2.5 to 5 watts per gallon of water. So, for a 30-gallon aquarium, you’ll need a heating device with a wattage of 75 W to 150 W.

Can a heater be too small for a tank?

There’s nothing wrong with a tiny heater. It’s pretty rare for an element to fail, especially if it’s mostly on. If it does fail, you get a colder tank, which is OK.

How many watts should a fish tank heater be?

A good rule of thumb for aquarium heaters is 5 watts per gallon for aquariums 55 gallons or smaller, and 3 watts per gallon for those over 60 gallons. Use a larger size or a second heater if your aquarium is in an especially cold room or is located on an exterior wall or near an outside door.


Can I use 2 heaters in my aquarium?

Purchasing two heaters will ensure there will always be a backup heater. It is a small investment to ensure the safety of your fish. Purchasing two lower wattage heaters will keep the temperature stable. … Two heaters means that emergency use in another aquarium is possible.