What to Look for When Buying Fish Tank Heater for Aquarium

By Kelley McCoy from modestfish.com

A fish tank heater is another important aquarium equipment for your fish tank. It is used to keep the water temperature stable, which is essential for your aquarium inhabitants’ health and well-being.

A good quality heater should be adjustable, and you can set it to the optimal temperature according to the type of fish you have in your aquarium.

Why are Fish Tank Heaters Important?

Fish tank heaters are an essential part of any aquarium setup, especially for tropical fish.

Not only do they provide a warm and comfortable environment for the fish, but they also help to maintain a stable temperature in the tank by keeping it from fluctuating too much. This helps to keep the water chemistry balanced and healthy for the inhabitants.

A properly heated tank reduces stress on the fish and can even extend their lifespan. It is also important when breeding certain fish species, as many require specific temperatures to spawn. Constant temperature ensures that beneficial bacteria thrive in the aquarium, further improving its overall health and stability.

Ultimately, having an appropriate heating system installed in your aquarium is one of the most important steps to setting up a successful and healthy environment for your fish. By maintaining the correct temperature, you can ensure their well-being and even extend their lifespan.

What Are The Risks?

Firstly, an inadequate heater may be not able to keep the water temperature at the optimal range for your fish. This can lead to stress and illnesses in your fish, which can quickly become fatal if left untreated.

A faulty heater may malfunction and cause electrical shocks or fires, leading to safety hazards and property damage. The heater could also leak chemicals into the water, which create dangerous levels of toxins that can harm or even kill your fish.

Finally, you could end up to spend more money on repairs than you initially saved by buying a low-quality product. Therefore, it is essential to do research before purchasing a heater for your aquarium and make sure that you buy one from a reputable brand.

buy fish tank heater

Different Types of Fish Tank Heaters

There are several different types of fish tank heaters available for aquariums. Depending on the size, style, and needs of your tank, one type may be better than another. The most common types are submersible heaters, hanging heaters, and inline heaters.

Submersible Heaters

Submersible heaters are the most popular type of fish tank heater. As the name suggests, they are heated elements that submerge in the water fully. Submersible heaters are typically adjustable and provide a reliable heating solution for most aquariums. They can be used to maintain a consistent water temperature with minimal effort.

Hanging Heaters

Hanging heaters are another popular type of aquarium heater. These are suspended above the water’s surface and release heat into the water. Hanging heaters work well in tanks which have limited space, as they require no additional equipment or parts to install. They do, however, require more frequent maintenance than submersible heaters due to their placement in the tank.

Inline Heaters

Inline heaters are the most efficient type of aquarium heater. These heaters run on electricity and circulate warm water throughout the tank to keep it at a consistent temperature.

Inline heaters require additional equipment such as pumps, tubing, and other parts to be installed properly, but they are very energy-efficient compared to other types of heaters. They are also easy to maintain and provide a reliable heating solution for large aquariums.

How to Choose the Right Fish Tank Heater?

The choice of the right fish tank heater depends on several factors, such as the size of your tank, what type of fish you are keeping, and the temperature requirements for your species.

Here are some tips to help you choose the perfect heater:

Determine What Size Heater Is Suitable For Your Tank

The general rule is that you should use a heater with a wattage rating that is equal to or greater than four watts per gallon. This means if you have a 10-gallon tank, then you need at least a 40-watt heater.

Make Sure the Temperature Range on The Heater Matches Your Fish’s Needs

For example, tropical fish prefer temperatures between 74-84°F, while goldfish prefer the temperature in the mid-60s.

how to choose aquarium heater

Consider the Type of Tanks You Have

Aquarium heaters come in both submersible and hang-on varieties, so make sure to pick one that is suitable for your setup. Submersible heaters go inside the tank, while hang-on models attach to the outside.

Check For Features Like Temperature Control

Many digital heaters offer adjustable thermostats or timer settings, and you can easily set and maintain the perfect temperature for your fish.

Invest in High-Quality Products

When selecting components for your aquarium, make sure only to purchase items from reputable manufacturers who use durable and safe materials with quality craftsmanship.

Avoid buying inexpensive or second-hand products, as these may not last for long and could put your fish at risk.

Be Mindful of the Placement

When setting up your aquarium, ensure position the heater away from direct sunlight or other heat sources that could cause it to malfunction.

It is also important to keep the heater out of reach of curious hands and paws!

Regularly Check Up on the Heater

To ensure it is functioning properly, inspect your aquarium equipment frequently. Ensure to remove any sediment buildup inside the tank and regularly check for signs of corrosion or leaking to prevent damage.

Follow All Safety Precautions Closely

Always read and follow all safety instructions provided with your tank heater. Following these guidelines can help you prevent electrical shock or injury to yourself or your fish.

Consider the Cost

Quality tank heaters can be expensive, so sure to budget accordingly and research different products before purchase.

Consider purchasing an adjustable heater which is capable of maintaining multiple temperature settings to get the most out of your money.


Make sure to research and consider the size of your tank, the type of water you’re keeping in it, as well as what types of fish you have or plan on having so that you can buy the best-suited fish tank heater for your needs. Also, pay attention to energy efficiency ratings and safety features when selecting your new aquarium heater.

Related heater review: The hygger 001 Aquarium Heater Video Review

With some careful research and thoughtfulness, you can ensure that you get the best possible fish tank heater that will keep your precious aquatic friends happy and healthy!

Related Products

Aquarium Double Quartz Heater
Frequency heater saving energy and easy to clean

hygger Aquarium Double Quartz Heater

hygger Tiny Titan Water Heater
Adjustable temp range is 59 - 93℉

hygger Aquarium Tiny Titan Water Heater


Leave a Comment

Your email address will not be published.