The 5 Best Heater for 30 Gallon Tank in 2023

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You might wonder what significant impact an aquarium heater play, and selecting any heater model for your tank will be good to go. Then, you are still in a world of a dilemma because a right heater is as much necessary as picking a correct filter for your tank. You don’t just want to go out in a market and pick the wrong heater for your 30 gallon tank.

Different sizes of tanks require a different heater model, and choosing the perfect heater can be a quite drooling task; since there are huge options available for the heater. Do not worry because you came to the correct place today as down below; I will be discussing about 5 of the best heater for 30 gallon tank.

Importance of a heater

An aquarium heater is one of the most important things in an aquarium. It is a must to have a device just like the filter. You always need to make sure that the water in your tank is at a certain temperature, and it doesn’t fluctuateEven if you have filled the aquarium at room temperature, but you can’t be assured that it will stay in that way. So, in order to keep it at the correct temperature, you will need a heater.

Not maintaining the water’s correct temperature will cause the fishes in your tank to stress out and loose colors and sometimes even die. It is very important to give them the perfect living condition that they require.

Different fishes have a different requirement when it comes to temperatures. So while choosing a heater, you have to be very careful to know your fishes’ characteristics and requirements. Some fishes require lower temperatures, while others require higher temperatures. Hence, it is best to get a heater that offers the temperature range that you require for your fishes in your tank.

Different Types of heater for 30 gallon tank

There are many different models of heater available for 30 gallon tank. It depends on your choices and preferences that which one you want to go for. Each of them is slightly different from the other, but all with the same motive of providing you with perfect water heating in the aquarium.

There are the submersible, in-filter, in-line, immersible heater, and substrate heaters. Make sure to choose your heater type wisely because you will surely get great performances if you do. For more information, go through our list of the top 5 heaters for a 30 gallon tank. Don’t just go for a heater because it looks good; do a proper study

about each of the different types of filters and what they have to offer. Most commonly, for 30 gallon tanks, submersible filters are used. They work well and provides great performances with a minimal amount of complaints.


5 Best Heater for 30 Gallon Tank


1. Tetra HT Submersible Heater 100W

Tetra HT Submersible Aquarium Heater With Electronic Thermostat
  • Electronic thermostat automatically maintains water temperature
  • Prevents overheating for extended heater life

Dimension and weight

The Tetra HT 100w has a dimension of 1.63 x 3.5 x 8.25 inches with a weight of 8.8 Ounces.


Tetra HT makes heaters for many different types of tanks. But here I will be talking about the HT20, a 100W heater suitable for 30 gallon tanks. This heater comes with an indicator light that tells you when the heater is on; it will be green when the water is at the correct temperature and likewise red when the heater is heating the water.

This heater is small and designed in such a way that you can easily hide it behind plants without compromising with the beauty of your tank. Furthermore, it is completely submersible, and you can keep it either horizontally or vertically according to your choice. They also come with an electronic thermostat, which keeps the water temperature constant at 78 degrees Fahrenheit.

They don’t compromise with safety either as they are designed to shut down if an electrical short is detected automatically.


  • Tetra HT is budget friendly.
  • The installation process is straightforward.
  • It comes with an indicator light.
  • Designed to be small and can be hidden behind plants or gravel.
  • Keeps the temperature constant at 78 degrees Fahrenheit.


  • You cannot adjust the temperature.

Final Words

If you are in budget and looking for a small and simple heater for your 30 gallon tank, then the Tetra HT is the one to go for because it is one of the cheapest models out there. Even though the temperature cannot be adjusted, it ensures that the water temperature remains constant, so it can be a good option for beginners.


2. Aqueon Preset Heater

Aqueon Preset Heater
  • Preset to 78°, accurate to +/- 1°
  • No adjustment required

Dimension And weight

The Aqueon Preset Heater comes with a dimension of  3.5 x 1.5 x 7.75 inches with a weight of 7.52 Ounces.


Just like the Tetra HT, the Aqueon present heater is also a very good choice for beginners. This heater is designed to be minimalistic and designed in such a way that it can be hidden behind plants inside your 30 gallon tank.

You can stay assured of the quality since Aqueon is not a new brand in the aquarium industry. This heater is designed to be shatterproof and is indeed very durable due to the fact that it is made up of shatter-resistant quartz glass. This heater is designed for most of the tropical fishes since the temperature is present to 78 degrees and is not adjustable.

It also showcases an indicator light that turns red while heating the water, and there is also a safety feature that will automatically turn off the heater for avoiding overheating. You can either keep this heater vertically or horizontally according to your choice, and is fully submersible.


  • Is suitable for most tropical fishes
  • You can keep it either horizontally or vertically.
  • Easy to use for beginners.
  • They are designed with shatter-resistant quartz glass.
  • Auto shut-off feature to avoid overheating.


  • The temperature cannot be adjusted.

Final Words

The Aqueon Preset heater is a compactly designed heater for a 30 gallon tank. It is one of the simpler models of heater that you can opt for and is definitely recommended for beginners. The Indicator is also handy to see when the water is heating.


3. Fluval M Electronic Heater 100W

Fluval E Electronic Heater
  • Aquarium heater that blends into the aquarium environment with built-in reflective technology that mirrors the...
  • Computer-calibrated thermostat and easy-to-adjust temperature control dial

Dimension and weight

This heater comes with a dimension of 1.8 x 3.3 x 15.3 inches with a weight of 15.26 Ounces.


This is one of the most technologically advanced heaters for a 30 gallon tank; it comes with a dual temperature sensor that allows it to measure temperature and show real time water temperature as well and is displayed in the LCD. Keeping up accurate temperature is one of the most significant elements in aquarium care. The Filter consistently measures and shows aquarium water temperature, guaranteeing your aquatic pets’ prosperity inside your 30 gallon tank.

With the simple to utilize lever switch, the temperature can be correctly set in 0.5° augmentations. The temperature readout will change color during regular activity if the aquarium water differs +/ – 2 degrees F from the preset temperature, and the colored LCD screen will flash in case if any external factors like the chillers cause the temperature of the water to go up and down beyond 5.5 Degree F. Make sure to take this flashing seriously since it indicates potential danger.


  • The temperature is displayed in both Celsius Fahrenheit and.
  • You can adjust the height as your preferences.
  • Comes with a temperature range of 68 To 93°F
  • The heater is very safe with two electronic thermostats.
  • The display is good looking and easy to see.


  • This heater needs high water flow to work correctly.

Final Words

This is one of the finest heaters for a 30 gallon tank, and if you have a higher budget, then you will love the Fluval M electric heater. This filter comes with an integrated fish guard that makes sure that the fishes inside the filter cannot come in direct contact with the heating core. The heater can be balanced or taken out without eliminating the mounting bucket; you can also place the heater at any angle you want to, and this will help you to view the screen in your preferred direction.


4. Aqueon Pro Heater 150W

Aqueon Adjustable Pro Aquarium Heater
  • Adjustable heat setting 68 to 88°F, Electronic Thermostat accurate to +/- 1°
  • Shatterproof and nearly indestructible

Dimension and weight

The Aqueon Pro has a 1.5 x 1.5 x 12.75 inches dimension with a weight of 1.2 Ounces.


Yes, another model from Aqueon. They make a lot of model heaters for 30 gallon tanks, and it was necessary to include this model in our list of best heater for 30 gallon tanks. Unlike the regular Aqueon Submersible heater, the pro version is more advanced, consisting of some useful features.

This heater is made with a tough, nondestructive shell for quality and even heat dispersion in the water. The heater comes with an electronic thermostat, which ensures exact temperature settings and a unique gravity shutoff security feature that means the electronic thermostat will automatically turn off the heater when its not in the water and auto turn on when the heater is placed back in the water.

The temperature can be controlled easily using the dial, which is situated at the top, and you can control the temperature with an accuracy of +/- 1F. The indicator light also helps to understand when the heater is on; green to tell you that your aquarium has come in the correct temperature and red while heating.


  • You can place it either vertically or horizontally.
  • The thermostat turns the heater automatically off when taken out of the water.
  • It is made from thermoplastic, which is indestructible and durable.
  • It comes with a temperature range of 68 To 88 Degrees F, which is Accurate To ±1 degree F.


  • You should not use this filter for saltwater tanks.

Final Words

The Aqueon Pro is a very easy to use filter with some great technology. It features auto shut off and turn on, which ensures max safety. The temperature can be adjusted easily using a simple knob with a precision of ±1degree F. Moreover, it is made up of thermoplastic, which is known as indestructible.


5. Boxtech Submersible Heater 100W

boxtech 50W 100W 300W Aquarium Heater, Submersible Auto Digital Control Thermostat with Proof Explosion, Heat-Resistant Quartz Made for Fish Tank 5-80 Gallon
  • Heater for Aquarium: 100W Aquarium heaters suit for 10-30 Gallon fish tank. Voltage:110V, Power cord is 4.59ft, Max deep...
  • Correct installation: Stick the heater vertical onto the tank side near the water intake or on the way of water...

Weight and Dimension

The Boxtech heater has a dimension of 9.45 x 1.97 x 3.54 inches with a weight of 8.01 Ounces.


The most interesting feature about Boxtech heater is that it has a huge heating range of 68ºF-90ºF, which means you can use this filter for most types of fishes in a 30 gallon tank.

This heater is very to install and use and is fully submersible; however, you need to keep the filter horizontally and close to water flow. The temperature control is fully automatic. This filter is optimized with an external temperature controller, which helps the heater stop heating when the water’s temperature goes below the set temperature. It will again start heating when the temperature rises above the set temperature.


  • It comes with an external temperature controller, which is easy to use.
  • It is built with explosionproof quartz glass.
  • Very high range of temperature, making it suitable for all types of fishes.
  • The heater is fully submersible.
  • Automatically turn off heating when the water temperature is below the set temperature.


  • You cannot keep it vertically inside the aquarium.

Final Words

The Boxtech is a very good quality small and durable heater for a 30 gallon tank. It is made up of explosionproof quartz glass, which makes it even more heavyduty; the automatic turn off and on heating feature makes this filter user friendly and very easy to useThe external control gives easy access to change the temperature according to your needs.


Buying Guide for best heater for 30 gallon fish tank:

Before choosing the best heater for a 30 gallon tank, you must know how to select the perfect heater. Hence, this buying guide will help you to find the best heater for a 30 gallon tank. Read and understand this guide carefully, and you will be able to select the best heater in no time.

  • Budget

Budget is an important factor while choosing a heater; a good heater for a 30 gallon tank will cost you anywhere in a range of 1050 dollars. However, as your budget increases, you will get heaters with even more unique and helpful features. The performance of your heater is highly proportional to your budget. Don’t just go for any random filters of cheap brands to save a couple of bucks. This might save you some money but may cause serious problems for the life of your fishes. Do proper research to get the heater in your budget out of the lot; for further help, you can always look at our list of best heater for 30 gallon tanks.

  • The weather in your area

While selecting the heater for 30 gallon tank, you must consider the weather and climate of the area you are living in. Some areas may have extra chilly winters, and some may have hot summers. So, it is important that you choose a wellbranded heater that can take the extra pressure of your chilly winters. However, if you live in an area where it isn’t too cold, then going for a normal heater which can keep the water at optimum temperature is good to go.

  • Maintenance

Every electronic devices and component require some type of maintenance; a heater is not an exception either. Since it will stay inside the aquarium, so you must think about the ease of maintenance that you will require to keep the heater in working mode. Read the description of each of the heater very carefully while buying a heater for a 30 gallon tank because you need to select a heater that is easy to maintain and replace parts if needed.

  • Types of heater

Aquarium heaters come in many different types; you must understand what type of heater is suitable for your tank. Generally speaking, a submersible heater is the best option for 30 gallon tank, since 30 gallon tank is not that big and you certainly do not want to ruin the space inside the tank with a very large heater.  Submersible heaters are very small in size and only require a little amount of space inside the tank.


Frequently Asked Question

After reading the best heater reviews for 30 gallon tank, you might still have some questions running around your head; down below, I will try to answer a few of the most commonly asked questions.

1. Is it necessary to have two heaters for a 30 gallon filter?

Answer: Generally, you do not need to have two heaters if you decide to invest in a good one (check our list for the best 5 heaters for 30 gallon tank). However, if you are living in a very cold area, it is wise to have two heaters in the sense that if one fails, you can use the other filter as a backup.

2. Where should I keep my heater?

Answer: Always try to place your heater as close as possible to the filter inlet. Heater works best when they get a warm flow of water. Placing your filter in this way will help you to utilize the full efficiency of your heater.

3. Should I place my heater vertically or horizontally in the 30 gallon tank?

Answer: Some heater can be placed both horizontally and vertically, whereas, on the other hand, some can be placed in one orientation only. When choosing the heater for your 30 gallon tank, read the description carefully and check which orientation your filter supports and place according to that.

4. Should I check my heater?

Answer: Well, all electronic devices need to be checked no matter how well they are built or how expensive they are. Heaters also overheat, so to save your heater from getting damaged, you should check your heater on a daily basis, and you can even keep an additional thermometer at the other end of the tank to check the correct temperature of the water and whether your heater is heating it properly or not.

5. What the perfect wattage for a heater?

Answer: Wattage of a heater depends upon the size of the tank you are working with. Different sizes of tanks require different wattage of heaters. As here, I have discussed about heaters for 30 gallon tanks, 30 gallon tanks heater with a wattage of 100150W. On average, if you go for a heater minimum of 100W, you can be assured that you will get the perfect performance.



So, far I have discussed about best heater for a 30 gallon tank. Choosing a correct heater is very important for the proper and healthy living of your aquatic pets. Always read the whole description of the heater properly before deciding to buy it. Buy the correct heater, and you no longer need to worry about your fishes’ healthy life. However, buy the wrong one, and you will suffer on a daily basis. From the rundown of the list above, it is feasible for you presently to pick the best aquarium heater easily. Numerous individuals who have utilized them generally wound up with top quality heaters that deliver perfectly what they are asked to do so. Don’t just buy these heaters on my words; for your own satisfaction, read through some more information regarding them, do your own research and them come back and compare them with my words; I assure you that you will be served with the best performances from my list of the best heater for 30 gallon tank.

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