Aquarium Heater Guide: All you need to know about Aquatic Heaters

Aquarium Heater Guide: All you need to know about Aquatic Heaters – Among fish keepers, Fishtank is the most debatable & Hot Topic. Any Fish Hobbyist needs to set up their fish tank properly according to a suitable environment for lovely fish.

Many of you already know about almost every aquarium accessory but today’s Discussion Topic is Aquarium Heater. I will try to cover almost each and everything about it and frequently asked questions according to my 8-year experience in fish keeping hobby.

Let’s Begin.

What is Aquarium Heater and why you need it?

Your fishes are unable to maintain their body temperature and adjust them according to their environment. So you need to maintain the fish tank heat artificially using devices that are known as aquarium heaters. It is a must-have an electric device in your fish aquarium. (not in case of Coldwater fishes)

How to know If your heater is working or not?

Instead of old manual aquarium heaters, Almost all the modern aquarium heater heats your aquarium water automatically. They have temperature sensors in them that can sense heat in the water and maintain the temperature accordingly.

If you have any doubt that your heater is not working well, In that case, you should have a look at your heaters LED light.

Many heaters have an LED indicator to tell you if they are in ON state or OFF. Others may have separate LED screens to show you the fish tank temperature, water pH and other various details right at that moment.

If you have an old heater with no LED indicator then you should keep the heater in a bucket of water and turn it on for 1 hour. If you sense the water in your heater is now warm it means your heater is working perfectly!

Heater Disorder: How to save your Fish from Cooking?

Any of you ever imagine that one day you come back to your home. Got all fish cooked in boiling aquarium water. It will be very sad news for you.

All fish parents keep their fish with very deep love, affection, and care. They treat them just like any other pet and to keep them alive. Now what to do to be on the safe side?

The first thing you need to take care of is always to buy a well-known product from a brand famous for it. Brands maintain product quality and make sure their products are of top standards.

Invest one time in a quality product and have a secure fish keeping rather than buying low-quality stuff and cry every other day.

On the other hand to secure your fish tank up to 101%. You can install an aquarium heater controller that will control your aquatic heater by itself.

It will shut off your heater in case of any buy or disorder. You can also buy a digital aquarium heater controller. You can see heater working status on the screen and now you have safe fish keeping.

What kind of heater do you need for your fish tank?

There are many kinds of heater you can choose from. It depends on your needs like your tank size, environment, and working criteria of your heater. Let’s have a look at every type to choose one for you.

Kinds of aquarium heaters and where to place them?

There are many types of heaters that you can choose from. I am going to explore here all types one by one.

Submersible heaters: As the name show that these heaters are submerged into your fish tank water.

In-filter heater: They are present inside your fish filter. They work with your tank filter.

Inline heater: They are set inside your sump or the filter to heat your fish tank to a fair degree heat.

Filter heater: These are inbuilt in the filter. They work very well. You don’t need to buy a separate tank heater to heat your fish tank.

There are more types of heaters but the well-known I have done above.

Setting up Aquarium Heater In Your Fish Tank

Fill your fish tank with water and install your heater wherever you find it suitable like on the right side of the glass or the left side. Now connect your heater with the mainboard and turn it on!

Heaters build thermostat which automatically senses your water temperature and then Sensor turns your heater on. When the temperature reaches its set position then the heater turns off.

Top Aquarium Heater Brands Are:

  • Tetra HT – Cheap and Reliable Popular & Best Submersible Heater
  • Fluval E Electronic Heater – Durable & Features Enrich
  • Eheim Jager Heater – Most Popular & Durable
  • Aqueon Pro Heater – For Safety Conscious People
  • Penn Plax fish tank heater– Heavy-duty Shock Resistant Glass
  • Aqua Top Quartz Heater– Genuine & Affordable
  • Marine Land Heater – Ideal & Precise Heating
  • Hydor In-Line External Heater – Best New Technology
  • Hygger Titanium – With digital thermostat and thermometer Free
  • Finnex Deluxe heater – Quite Pocket & Budget Friendly
  • Catalina RF-1000T – Best For Large Aquariums with 1000watts- Trickily to handle
  • JBJ True aquarium heater – Amazing But Expensive

These are top picks you can choose from but Fluval heater is my best one. After that Aqueon and for cheap you can go with Tetra ht heater.


An aquarium heater is the most essential thing to have in your aquarium if you want to keep your fishes happy and give them a homely environment.

You can buy in budget and pocket-friendly heater for better working. Have a happy fish keeping. If you have some questions feel free to ask in the comments below.

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