Best Aquarium Heater

What is the best aquarium heater on the market?

The aquarium heater or thermo-heater is an essential element, to achieve the right temperature in which our fish grow and develop in perfect conditions.
Remember that fish are cold-blooded animals. Tropical fish need the water to be at a certain temperature to maintain their own body temperature.
The temperature of the aquarium water can suffer variations in certain situations, such as the ambient temperature or simply, with the operation of the aquarium filtering itself.
If we do not control the temperature of the aquarium correctly and sudden changes occur, this situation will cause stress to the fish,which in many cases lead to unwanted diseases. Do not play it when buying a heater, choose well which aquarium heater you are going to install, check the comparison of the best.

Comparison of best aquarium heaters 2020

What aquarium heater to buy? Best quality price aquarium heater

JBL Protemp Aquarium Heater

The JBL ProTemp heater is prepared for aquariums up to 300 liters, although the variety is wide, from 10 liter aquariums to 400 liter aquariums, with a fairly contained price.
It is made of glass resistant to high temperatures and for greater protection of the fish, it comes with an anti-aggression protector. Another of its protections allows automatic shutdown, if it detects that the aquarium water level drops.
This heater is available in different power formats. Serves as a small aquarium heater: it is capable of heating a 10-liter aquarium, up to 400 liters, depending on the size.
It allows to set the temperature between 20ºC and 34ºC, with enough precision.


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  • For aquariums: 100 to 300 liters
  • Power: 200W
  • Temperature setting: 20ºC to 34ºC
  • Accuracy: +/- 0.5º
  • Manufacturing material: Protected quartz crystal
  • Length: 80 to 120 cm

JBL Protemp Heater Buyers’ Opinions

It is a good aquarium heater at a fairly reasonable price, for the JBL brand.
The temperature controls it perfectly. In my case, the degrees of water temperature correspond to what the heater indicates.

I am satisfied.


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Fish tank heater BPS 50W

Without a doubt, the BPS professional heater is one of the best and cheapest on the market, and the quality it has in relation to its price is surprising.
It is an aquarium heater from 25 liters to 50 liters, which is also available in other sizes, as a heater for large aquariums. One of the most requested is the BPS 250W, for aquariums from 120 to 250 liters.
It is totally submersible, but there are no risks in the aquarium: it is made of double glass and has two suction cups for placement. Unlike Sera’s heater, it doesn’t bring extra protection.
It allows us to modify and regulate the temperature range between 16ºC and 32ºC, and it has a light to know that it is working.


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Features BPS aquarium heater

  • For aquariums: 25 to 50 liters
  • Power: 50W
  • Temperature setting: 16ºC to 32ºC
  • Accuracy: +/- º
  • Manufacturing material: Double insulated glass
  • Length: 22.3 cm

Buyers’ opinions of the BPS aquarium heater

I am pleasantly surprised, because it is quite good, better than I expected for the price. Mark the temperature with great precision.

Perhaps and to put a hit, it is something great, although in return it works well.


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Sera heater

The Sera 8710 300W thermo-heater is designed to heat aquariums between 150 liters and 300 liters , although if you like the design, aquarium heaters are available from 20 liters.
They are made of a 2 mm thick quartz glass, considered highly resistant. But for greater safety of use and for the fish themselves, it comes with a protective casing.
The temperature can be regulated in an interval between 18ºC and 32ºC, it is easy to detect if it is in operation thanks to the fact that it has an LED warning light, which we will see on or off.
Another advantage that this heater has over others is that it is very small, It only measures 3.5 cm in diameter and 35 cm long.


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  • For aquariums: 150 to 300 liters
  • Power: 300W
  • Temperature setting: 18ºC to 32ºC
  • Accuracy: +/- º
  • Manufacturing material: Quartz glass with protective shell
  • Length: 35cm

Sera 300W Heater Buyers’ Opinions

Very good, it is super accurate with temperature readings and easy to adjust.
I think it is the best aquarium heater I could buy. It is very well concealed in the rear panel of the aquarium.

The truth is, I am very happy with the purchase.


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Tetra heater

This aquarium heater is perfect for heating aquariums up to 225 liters in complete safety.
The main characteristic of this heater is its fully automatic operating system.
Being made with a double ceramic heater and a watertight cap, it is totally submersible.
It is also extremely resistant, the tube is made of extra thick borosilicate glass, very resistant to temperatures and impact.
It allows to regulate the temperature between 19ºC and 31ºC.


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