Asked by: Invencion Evranov
pets fish and aquariums

How many watts does an aquarium heater use per gallon?

5 watts

In this regard, how many watts do I need for my aquarium heater?

Most aquarium heaters range from 25 watts to 300 watts. Smaller aquariums require smaller heaters. A 10-gallon tank, for example, will typically need a 25- to 75-watt heater, while a 75-gallon tank will require 250 to 300 watts. Larger tanks may require multiple heaters.

Also, can I use a 50 watt heater in 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.

Likewise, will a 50 watt heater work for a 20 gallon tank?

Yes you can have a 50 watt heater in a 20 gallon. Another thing is since a betta tank should be kept at 78-80 you might overwork the heater. Normally larger is better so that you don't over work the heater.

How many watts does a 40 gallon tank need?

A 40 gallon fish tank will need at least a 120-watt heater if the room it is kept in is 5 degrees cooler than your aquarium. If the room is 10 degrees cooler then a 40 gallon tank will need a 200-watt heater.

Related Question Answers

Kristof Weydt


Do aquarium heaters use a lot of electricity?

Aquarium Heating
For a 30 gallon tank heated to 72°F you'll need 110 kWh per year, while the same tank heated to 82°F will consume 440 kWh per year, which is four times as much electricity.

Yongsheng Grokhar


How many gallons can a 50 watt heater heat?

Aquarium Heater Size Guide
Tank Size Heat 5 Degrees C 9 Degrees F Heat 10 Degrees C 18 Degrees F
5 Gallon/20 Liter 25 watt 50 watt
10 Gallon/40 Liter 50 watt 75 watt
20 Gallon/75 Liter 50 watt 75 watt
25 Gallon/100 Liter 75 watt 100 watt

Sinay Domper


Is a 50 watt heater for 5 gallon tank?

50-watt heaters are usually used to heat tanks between 3-10 gallons. While you can use a 25-watt heater for your betta tank they're normally not as reliable. With that being said here are 5 of the best heaters for a 5 gallon betta tank.

Sarasvati Karken


Can I put 2 heaters in my aquarium?

It is becoming a popular practice to use two aquarium heaters rather than just one. There are many species of marine and freshwater fish that live in warmer climates of the world. However, using a single heater is never recommended. Using two heaters in the aquarium have a number of advantages.

Jula Gagonin


What is the most reliable aquarium heater?

Our Top 10 Picks for the Best Aquarium Heaters
  • #6 Fluval E Electronic Heater.
  • #5 Hydor In-Line External Aquarium Heater.
  • #4 Eheim Jager Aquarium Thermostat Heater.
  • #3 Tetra HT Submersible Aquarium Heater with Electronic Thermostat.
  • #2 Cobalt Aquatics Neo-Therm Aquarium Heater.
  • #1 Aqueon Pro Adjustable Aquarium Heater.

Hermelina Rohlfsen


How can I heat my fish tank without a heater?

In order to warm a betta fish tank without a heater, you can try a few things. Place a thick blanket or towel around the tank to create insulation. Also, move the tank to a warmer place at your house to raise the temperature up. Fill a plastic bottle with boiling water for a few mins and take the water out.

Kelsi Ackeren


What size heater do I need for a 3ft fish tank?

What Wattage Heater Do I Need For My Fish Tank Aquarium
Tank Size Heat 5ºC/9ºF Heat 10ºC/18ºF
25 gal/100 L 75 watt 100 watt
40 gal/150 L 100 watt 150 watt
50 gal/200 L 150 watt 200 watt
65 gal/250 L 200 watt 250 watt

Reda Goldmanns


Do goldfish need a heater?

Heaters are not necessary in a goldfish tank. Slim-bodied goldfish can tolerate low temperatures just below (above) freezing; however, (some?) fancy goldfish cannot tolerate water temperatures lower than around 55 degrees F. So, unless you want your tank at a constant temperature, goldfish don't need a heater.

Choudhry Johnsen


Does Walmart sell fish tank heaters?

100-Watt Aquarium Heaters -

Kenay Sikorsk


How many watts does a 20 gallon bearded dragon need?

Use a 50-watt spot/heat bulb for a 20-gallon tank or 75-watt to 100-watt spot/heat bulb for a 30-gallon breeder tank. Place heat bulb at one end as a basking spot for a minimum of 4 hours a day(Don't use a heat rock, just a plain rock if you plan on putting one inside your cage).

Sarata Boecke


Do betta fish need a heater?

Though people don't often think of them this way, Betta are tropical fish. That means they live in warmer water in the wild. They require temperatures from the mid-70s, up to around 80 degrees. If your room temperature is consistently in the mid-70s at the lowest, you can get by without a heater.

Yuqi Mascato


What size heater do I need for a 125 gallon aquarium?

Heating a 125 Gallon Tank - Tropical Fish Keeping - Aquarium fish care and resources. Would I be better off getting a Marineland 400 Watt heater, which is rated for up to 125 gallons, or getting two Marineland 300 Watt heaters, rated up to 65 Gallons each.

Abelio Newill


How long does it take for aquarium heater to work?

Best to fill your tanks with near lukewarm water to start with and save the heater from trying to catch up. I agree that it should take about 24 hours.

Milan Siefke


Can a fish tank heater be submerged?

Submersible aquarium heaters can be fully immersed in the aquarium water. If your submersible heater has an internal thermostat, it is usually more efficient if you position it horizontally in the tank, and fairly low in the water column.

Katheleen Fiethen


Do guppies need a heater?

Guppies are tropical fish and they like warmer water. So, do I need a heater for my guppy fish tank? The short answer is, YES! You need to heat the water for your guppies, unless you live in a tropical climate, where the temperature does not drop under 68 °F (20 °C).

Shamaila Zheng


What temperature should a fish tank be?

A good range is 76° to 80°F (25° to 27°C). A few species need to be kept several degrees warmer, and some species require temperatures a few degrees cooler. A thermometer is vital. A stick-on type enables you to check the temperature whenever you look at the aquarium.

Lucimara Coronha


Does a 3 gallon tank need a heater?

Heaters come in lots of different sizes. Larger ones are used in larger tanks because they need to be more powerful to heat the extra water. A 3 gallon tank needs a small heater. A heater for this tank will be between 10-15 watts.

Yasunari Kalabekov


How many shrimp can I put in a 2.5 gallon tank?

It's generally around 10 shrimp per gallon but you need to compensate for breeding and maybe how planted your tank is (maybe).

Layne Zamfir


How hot does the Aqueon mini heater get?

One tank has a non-heated temp of just under 75 but, with the heater running, it heats up to about 81.6!. The other tank is in a warmer environment and, right now, temps are running around 79 degrees non-heated.