Top 5 Best Heaters For Small Aquarium

best heaters for small aquarium
Care & Maintenance

Aquarium fish can make your home look more lively. They are colorful, pretty, and don’t require that much of attention. But you have to do certain things to keep the fish healthy and comfortable. An aquarium heater is an essential device that can keep your fish comfortable and healthy. The fish needs to be comfortable in an aquarium and temperature is a key consideration when rearing fish.

Unlike mammals, fish cannot produce their own body heat to keep the temperature in their body constant at all times. In fact, their body temperature will change depending on the surrounding temperature. That is where an fish tank heater comes in handy.

The aquarium heater can provide a comfortable environment for the fish to live. Fish have a small range of liveable temperatures. Outside this range, the fish will struggle to survive. That is why you need to choose the right aquarium heater to provide a habitable environment for your type of fish and their companions.

Here are some of the best mini aquarium heaters for small aquariums.

1. Hydor In-Line External Heater


This is one of the first heaters designed with the PTC technology. This technology ensures maximum security against an overheating risk. The heater should be placed in the aquarium vertically for proper operation. The best way to install this mini tank heater is on the return lines that are originating from the canister filters. The heater is highly customized and can be used in any circumstances. The productivity of the device is high. It heats due to an inner heat pump framework to prevent temperature variations. This mini fish heater can be used in freshwater and marine aquariums.

Pros –

. The heater is efficient due to the flow of the filter
. The device keeps the hardware out of the aquarium
. There is a thermostat for consistency in temperature
. This small aquarium heater comes in different connector sizes and wattages for different filters and aquariums.

Cons –

. It tends to leak off if the glass tube is broken

2. EHEIM Jager Aquarium Heater


This is another quality small aquarium heater on the market. It comes in different watt levels – starting from 25 watts to 300 watts. The design is similar to most of the other mini heaters. It is similar to a long tube-like figure. The temperature control is easy to read and use. There is a simple setting function to let the user set the desired temperature. The protection feature tends to turn off the heater when the water level dips too low to protect the fish.

Pros –

. Different watt levels
. Shock resistant and shatterproof
. A great design
. The TruTemp system recalibrates the heater for a more precise temperature regulation.

Cons –

. Many users have complained that the TruTemp system fails at times and the device overheats.

3. Aquatop Quartz Glass Aquarium Heater


This heater has a simple yet elegant design. It is available in one size with a higher watt level. The heater has a double insulation feature due to the higher wattage level. The insulation feature is made of quality insulated glass. This feature helps lower the impact of the water if it overheats. The Temperature Adjustment knob helps easily adjust the temperature.

Pros –

. Elegant yet simple design
. Powerful enough to handle a large aquarium
. Easy to use and heat the water

Cons –

. Temperature setting can be inaccurate at times
. Only one size

4. Fluval E Electronic Aquarium Heater


This heater has four sizes with different watt levels such as 50, 100, 200, and 300 watts. The device is shatterproof and can be used in both freshwater and marine water. It is corrosion and wear resistant. The temperature is easy to set with an adjustment lever. There are advanced safety measures such as shatterproof, shockproof, and overheating proof.

Pros –

. Solid build
. Variety of sizes
. Advanced safety features to safeguard the fish
. Dual thermal sensors and LCD screen to provide temperature readings.

Cons –

. Expensive compared to other heaters on the market.

5. Finnex Hang-On Electronic Aquarium Heater


This heater is available in six different sizes and different watt levels such as 50, 100, 150, 200, 300, and 500 watts. This heater is ideal for a 120-gallon tank. This product is made of titanium instead of glass material. It is strong and resistant to breaking or cracks. There is a special corrosion resistant material covering this heater. An electronic control is a special feature of this product.

Pros –

. Corrosion resistant
. Solid build
. Variety of sizes
. There is a temperature control outside the tank

Cons –

. Can overheat easily
. Expensive

The aforementioned are some of the best mini tank heaters for a small aquarium.


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