Best 5 – 15 Watt Aquarium Heater Review

Usually, for the novices, it is hard to find the best 15 watt aquarium heater on the market that can heat uniformly, a tank smaller than 15 Gallon.

As the heaters need extreme accuracy and efficiency to heat a medium sized or small fish tank, otherwise they will end up burning the fishes.

So, you just cannot trust any heater.

Benefits Of Having The Best 15-watt Aquarium Heater

  • Adjusts the temperature of the tank automatically.
  • Can control huge temperature fluctuation.
  • Saves electricity.
  • Do not overheat the tank.
  • Keeps your fishes safe.

Certainly, to find a good quality 15 watt aquarium heater you need to be more insightful about aquarium related products. But in case, you don’t have that and dwindling between innumerable choices, I will help you to choose the ideal one for you.

Here in this article, you will get the top aquarium heater reviews of 15 watt, 10 watt, 7.5 watt and 5 watt.

According to the size of your fish tank, you can choose any of them. But read the reviews carefully for better compatibility.

Best 15 Watt Aquarium Heater Reviews – 2017 Top Picks

1. Aquatop Nano 15 Watt Aquarium Heater

It is always difficult to find the best 15-watt aquarium heater when it comes to a small or nano sized tank. The small aquariums have more fluctuation in temperature than bigger tanks. Also if the heater is faulty then, there always remains the risk of burning the fishes.

Aquatop Nano Aquarium Heater, 15-WattSo, to avoid all these nuisances, it is recommended to buy a heater from a trusted brand like Aquatop. The heaters this brand manufactures have brilliant designs to maximize safety for both the user and the aquatic lives.

Features:

 The Aquatop Nano Aquarium heater of 15 watt is equipped with all the essential features to make the tank water comfortable enough for your fishes to swim freely. These are the features which are worth mentioning –

  • This 15 watt fish tank heater from Aquatop has the ability to control the temperature of fish tank up to 4 gallons.
  • The built in precise electronic thermostat helps the heater in even heating of the aquarium.
  • The housing of this 15 watt tank heater is made with unbreakable or reinforced plastic so that you can get a durable built for years.
  • The temperature of the heater is preset to 77 degrees F.
  • The temperature controlling accuracy of this heater is +\- 1.8 degrees F.
  • There are built-in suction cups which will help in easy installation.
  • The dimensions of the heater are ¾ x 7/8 x 5 3/8 inches.
  • The weight of this device is 5.6 ounces.

Last Verdict:

The features of this Aquatop 15W heater are essential to give your small tank a healthy environmental boost. Also, there is no risk of getting your fishes hurt as the heater will automatically shut down if the targeted temperature is reached.

So, this is definitely a worth recommending heater.

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2. Hydor Slim 15 Watt Aquarium Heater for Bettas, Bowls and Aquariums

If you have an aquarium between 5 – 15 gallon, then the best-suited heater for you will be of 15 watt. In case, you have just started your fish keeping hobby and don’t know what are the exact features you will need in your heater then, this review is a must-read.

Hydor Slim Heater for Bettas, Bowls and AquariumsThe Hydor Slim 15 W aquarium Heater for Betta tanks, bowls and small aquariums is specially designed for those aquarists who want a simple and user-friendly heater which will not give them any trouble while operating.

Features:

 The features of this 15 watt aquarium heater are worth having for any novice, who have a little experience in fish keeping. The best part of this heater is that it works on its own yet offers the most comfortable environment for your fishes.

  • This heater of 15 wattage is capable of controlling the temperature of fish tanks from 5 to 15 gallons with ease.
  • All you have to do is to switch it on and it will start heating automatically. And once the desired temperature has been reached it will shut down automatically.
  • You do not have to set the temperature of this 15 watt aquarium heater, as the innovative positive thermal coefficient element of the heater will automatically heat the aquarium water to an average of 5 – 10 degree warmer than your present room temperature.
  • You can place the heater under the gravel and let it heat efficiently.
  • There is no glass component in this heater which means you can use the heater freely without any chance of breaking it.
  • The dimensions of the heater are 6.5 x 0.2 x 3.2 inches.
  • The weight of the heater is 4 ounces.

Last verdict:

 If you are in need of a heater that will help you to fix the temperature of the fish tank, even when you are sleeping or out of the house, then having this Hydor Slim 15W tank heater will give you all these benefits.

It is one of the best user-friendly heaters on the market, that will be the perfect buying decision both for the novice and an advanced level aquarist in terms of efficiency and durability.

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Best 10 Watt Aquarium Heater Reviews

1. Cobalt Aquatics Mini-Therm Top Heater Of 10 Watt

The Cobalt Aquatics mini heater of 10 watt, is very useful for those who have just started keeping fish and don’t know the exact caring process for the aquatic lives.

As keeping a heater needs experience, buying a self-equipped heater will be much more beneficial for an entry level aquarist.

Cobalt Aquatics Mini-Therm Heater, 10 wattIt also comes at a really affordable price, so if you are short in budget but still need an efficient and impact-proof heater then buying this Cobalt 10 watt mini heater will be the correct choice for you.

Features:

 All Cobalt Aquatics products come with power packed features which are very useful for any buyer. This 10 watt mini heater also bears some of the worth mentioning features –

  • The Cobalt Mini heater of 10 watt is capable of controlling the temperature of fish tanks up to 2.4 gallons.
  • The heater needs to be fully submerged in the fish tank. Clearly, it will give you an efficient heating.
  • The ceramic heat radiator of the heater helps in controlled and even heating of the tank water so that your fishes can have a healthy and comfortable life.
  • The housing of the heater is made of the thermal plastic polymer which is completely shatter-proof in nature. Hence you can easily use the heater without any tension of breaking it.
  • The heater is capable of heating both the freshwater and saltwater tank.
  • The dimensions of the heater are 5 x 1 x 1 inches.
  • The weight of the heater is 5.6 ounces.

Last Verdict: 

I don’t think, I need to exaggerate much. The reasons are very clear why you should buy this heater but for a recap – this Cobalt heater will give you an efficient, durable and accurate service at an affordable price.

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2. Elive 10 W Micro Heater Fully Submersible Aquarium Heater

Elive is very popular among the aquarists for manufacturing quality products like the tank heaters which work very efficiently. As micro heaters need precision to operate properly, you cannot trust just any brand to buy the first submersible heater for you.

Elive 10W Micro Heater, 3 Gallon, Fully Submersible, Small Aquarium, Fish Tank, Fish Bowl, with Suction CupsBut if you consider buying a heater from Elive you will get guaranteed satisfaction and accuracy in service. This 10 W mini heater is also not an alternative.

Features:

 All of the features, this Elive 10 watt mini heater has are worth mentioning.

  • Elive offers the 10 W micro heater which easily controls the temperature of the fish tanks up to 2 Gallons.
  • The heater needs to be submerged in the tank water and works without any problem for both saltwater and freshwater.
  • The sturdy built of the heater comes from the shatter-proof thermoplastic which remained sealed properly even when kept in saltwater.
  • The set up process is very easy. All you have to do is to just plug it in and then it will do its job properly.
  • The built-in switch engraved for protection is there, to keep your fishes safe from the warm heater.
  • There are two suction cups installed in the heater which will help it to mount properly inside the fish tank.
  • The limited lifetime warranty is for cases, where the heater arrived at the owner defective or any manufacturing defect occurs during the operation of the product.
  • The dimensions of the heater are 8 x 2 x 5 inches.
  • The weight of the heater is 6.4 ounces.

Last Verdict:

Elive 10 W mini heater has very useful features that an ideal heater must have. Also, it comes with a lifetime warranty and affordable pricing. So overall, it will be a great deal for any aquarist.

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3. Aqueon AQE06194 Mini Heater for Aquarium- 10 watt

All Aqueon products are well appreciated by the users because of their responsible built. The aquariums and aquarium related products of Aqueon are made with absolute care and brilliance so that the users can enjoy the service of a great product.

Aqueon AQE06194 Mini Heater for Aquarium, 10-wattThis 10 watt heater from Aqueon is also not an alternative. So if you are thinking of having it, then let’s take a closure look on its features.

Features:

 The features of this product are –

  • The heater is capable of controlling the temperature of both freshwater and saltwater aquarium up to 2.4 gallons.
  • The best you can do is to fully submerge the heater in the aquarium so that you can get a uniform heating.
  • You do not need to set the temperature of the heater by your own as the heater will automatically adjust the temperature of the heater according to your room temperature.
  • The heater is made in Italy with durable material.
  • The dimensions of the heater are 1 x 1 x 1 inches.
  • The total weight of the heater is 4.8 ounces.

Last Verdict:

If you are thinking of having a heater for you small tank at an affordable price which also has the ability to control the temperature of the fish tank without any supervision then going for this heater from Aqueon will be the perfect choice for you.

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Best 7.5 Watt Aquarium Heater Reviews

1. Bettatherm Mini Size Betta Best Bowl Heater

No matter how small is the size of your fish tank, using a heater is crucial. So, if you have a betta bowl of 1 – 1.5 gallon, you definitely going to need a quality heater like the Bettatherm mini size betta bowl heater.

Bettatherm Mini Size Betta Bowl HeaterIn case, you are not ready to spend much right now and thinking of having an affordable heater then this is definitely the right choice for you.

Features:

 The features this heater is incorporated with a really useful and worth paying for.

  • The housing of the heater is really sturdy and damage proof.
  • You need to submerge the heater fully or you can keep it under the gravel and get an even heating,
  • Once the heater is on, it will remain on, until you pull the plug from the socket.
  • It will increase the tank temperature 8 – 10 degrees higher than the room temperature.
  • It is the best heater for betta fishes.
  • The cord is kept in an angled position so you can easily attach it to the outside of the tank with the help of the suction cups.
  • The dimensions of the heater are 5.8 x 2.2 inches.
  • The weight of the heater is 0.7 ounces.

Last Verdict:

 If you are not aware of the procedures of using an aquarium heater then you must buy a heater that has the ability to do the necessary tasks on its own. Also for smaller tanks, you will need a heater with a compact shape like this Bettatherm Mini size heater.

And the affordability of this 7.5 watt heater is also worth mentioning which is why I will definitely recommend this heater to you.

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2. Hydor Slim Heater 7.5 watt for Bettas, Bowls and Aquariums

Hydor is one of the top rated manufacturers in the industry that can be trusted for quality aquarium related products. If you have any earlier experience with the Hydor aquarium filters then you must be a fan of this brand.

Hydor Slim Heater for Bettas, Bowls and AquariumsAnd now you can try your hands on the Hydor Slim Heaters which are manufactured in a variety of ranges including various shapes.

This heater from Hydor is very popular because of its ideal shape as it allows the user to keep it inside the aquarium without eating up much space.

Features:

 This 7.5 watt aquarium heater from Hydor has enough features to function as a standalone aquarium heater so that you can get a complete heating element at a cost-effective price.

  • The heater is capable of heating or controlling the temperature of the fish tank up to 5 Gallon.
  • The housing of the heater does not include any glass material, which means even after continuous heating, there is no chances of an impact on the heater.
  • This is an extremely easy to use heater hence best for the beginners.
  • Other than that, you do not need to set the temperature of the heater as it has the ability to control the temperature by its own. It heats up the aquarium 5 – 10 degrees more than the current room temperature.
  • All you have to do is to just plug the heater and it will start accomplishing the entire work efficiently.
  • You can place the heater under the gravels so that it does not take up much space in the tank.
  • The heater has a 90 degree angle which is a perfect fit for any betta bowl.
  • The dimensions of the heater are 3 x 0.2 x 3 inches.
  • The total weight of the heater is 1.6 ounces.

Last Verdict:

If you have just set up a new aquarium or a betta bowl and now looking for a quality heater that can accomplish the job by its own, efficiently, then the 7.5 watt Hydor heater is just the right equipment for you.

As the heater is self-sufficient and does not need any supervision, you can completely rely on it. So, I will definitely recommend this heater to those busy aquarists who are worried about their betta’s health.

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3. Deep Blue Professional ADB12881 Bettastik Sub Heater for Aquarium

Deep Blue Professional is literally pro at manufacturing aquarium heaters for smaller tanks like that of bettas.

If you are currently worried about having a quality heater that can make your betta happy enough to make bubble nest then the reliability of this heater will solve all your issues.

Deep Blue Professional ADB12881 Bettastik Sub Heater for Aquarium, Mini, 7.5-wattI will not lie to you, as this heater does not have the ability to heat a fish tank more than 2.5 gallons. So, if you have a bigger tank then read the reviews of the 15 watt aquarium heaters as they are perfect heaters for up to 15 gallon.

Features:

 The features this heater includes will help any aquarist to completely rely on this heater without taking any headaches of controlling the temperature of the fish tank.

  • The heater is capable of heating or controlling the temperature of up to 2.5 gallons without any supervision.
  • You do not have to set the temperature of the heater, as it has the ability to maintain the temperature of the betta tank by adjusting the current room temperature.
  • This heater is made in the United States with great efficiency, hence it is a quality equipment.
  • The heater stays in its place and does not move around at all.
  • The dimensions of the heater are 1 x 1 x 1 inches.
  • The total weight of the heater is 3.2 ounces.

Last Verdict:

 You can definitely have this affordable heater for your 2.5 gallon or smaller fish tank. This 7.5 heater from Deep Blue Professional will not disappoint you at all, as it offers great accuracy and precision in controlling the temperature of your fish tank.

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Best 5 Watt Fish Tank Heater Reviews

1. Cobalt Aquatics Mini-Therm Small Tank Heater

The Cobalt Aquatics heaters are no doubt one of the most sought after heaters in the industry. As the mini heaters manufactured by them, are well equipped with useful features.

These heaters are also capable of keeping the fish tanks healthy enough for the fishes to swim around.

Cobalt Aquatics Mini-Therm Heater, 5 wattIf you are in need of a mini heater then this 5 watt aqaurium heater can be the best choice for you. In case you need to heat more than 5 gallons of fish tank then you can check the reviews of the 15 watt fish tank heaters.

Features:

 The features of this 5 watt aquarium heater are –

  • This heater from Cobalt Aquatics has the ability to control the temperature of the fish tank up to 1.5 Gallons.
  • You need to submerge the heater completely in the aquarium so that it can give your tank an even heating productively.
  • The ceramic heat radiator incorporated in the heater offers a controlled heating uniformly inside the aquarium so that your bettas can swim happily without any stress.
  • The heater is made of a thermal plastic polymer which is completely shatter-proof in nature, hence, using the heater for a newbie will not be a problem at all.
  •  The heater is capable of heating both the tank water of freshwater and saltwater.
  • The dimensions of the heater are 5 x 1 x 1 inches.
  • The weight of the heater is 4 ounces.

Last Verdict:

 Cobalt is well known for manufacturing aquarium products and has been in the industry for ages, so if you put your faith in this mini 5 watt heater, I can guarantee you, that it has the ability to complete your task of heating automatically.

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2. Marin Betta Submersible Heater for Small Aquarium

Marina is one of the top rated manufacturers in the industry which manufactures aquarium related products and mostly famous because of it aquariums. As they have years of experience in manufacturing equipment for fish tanks, you can easily rely on their precision and quality.

Marina Betta Submersible Heater for AquariumThis 5 watt heater from Marina has a huge fan following as the heater is perfectly capable of heating the betta tanks so that the fishes remain in good health.

Features:

 The features of this 5 watt aquarium heater are very useful for any new starter or advanced level betta tank keeper.

  • The heater has the ability to control the temperature of up to 1.5 gallons of aquarium.
  • It can automatically create the ideal temperature for the betta fishes so that they can happily make bubble nests.
  • No need of fixing the temperature manually as the temperature is already preset in the heater.
  • The heater is made of durable polymer instead of glass so that it can last longer.
  • When the heater is on and working, the red light will illuminate. Once the heater completed the heating process, the red light will shut down automatically.
  • To get a uniform heating you need to submerge the heater completely with the help of the suction cups given with this heater.
  • The dimensions of the heater are 1.7 x 5.3 x 7.1 inches.
  • The weight of the heater is 6.4 ounces.

Last Verdict:

Marina is a brand that you can trust with your eyes closed. So if you are making the decision of buying this heater for your small tank, then, it is definitely a great decision. Also, the price of the heater along with the features makes it a great cost-effective deal for you.

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Bottom Line:

 An ordinary 15 watt aquarium heater is very common on the market as you have a plenty of options to choose from. But finding the best 15 watt aquarium heater for your fish tank is tougher if you are a complete novice in the fish keeping hobby.

For this reason, I have given you the list of top 15 watt aquarium heater reviews so that you can pick the most efficient one for you. You can also select from the 10 watt, 7.5 watt and 5 watt reviews in case you have a smaller tank.

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