Best aquarium thermometers: Reviews &Top Picks

Best Aquarium Thermometers

Every aquarium needs a thermometer. In fact, you have a thermometer inside your aquarium right now. But is your thermometer accurate? Have you actually thought about the accuracy of your thermometer? What you need to know is that if your thermometer cannot be relied upon to give accurate results, then it is useless. But you need not to worry if you have been using an aquarium thermometer that cannot be relied upon. Look at the following most common types of best aquarium thermometers.

But before that, do you know what an aquarium thermometer is? And do you need one?

An aquarium thermometer is a tool that measures the temperature of water in an aquarium. These days, there has been an increased use of thermometers in homes as people use thermometers to adjust thermostats while some use them to check if the roast has cooked well. Some even use thermometers to check the temperature of their children. Aquarium thermometer is used to check the temperature of water in the tank. They are popularly known as fish tank thermometer.

Actually, an aquarium thermometer is a very important tool and also very essential when you own a fish tank in your home. What you need to know is that you cannot check and determine the temperature of water in an aquarium by just looking at it. Thermometers are therefore very important as it allows you to check and confirm the temperature of water in an aquarium and confirm if it is the right temperature for the fish in the aquarium. For these reasons and many others, as you buy the best aquarium pumps, you also need to ensure that you purchase the best aquarium thermometers as well.

What are the different types of thermometers in the market?

Actually, there are three different types of thermometers that are commonly used for determining the temperature of the water inside the aquarium. By reading and knowing the different types of thermometers, you will realize that some thermometers are better than others. Have a look at them.

1. Digital aquarium thermometer and probe

Digital thermometer and probe for aquariumThis type of thermometer is made up of two different parts, that is, the sensor probe that sits under the water in the fish aquarium. Its function is to check the temperature of water. Also, there is a digital display. This part remains outside the water, and its function is to display the temperature of the water in the fish tank. Its function is also to house the batteries of the thermometer.

Why is this type of thermometer split this way?

The reason why the two parts are separated is to ensure that the electrical part of the thermometer does not mix up with water. Therefore, the electrical part of the digital thermometer does not get wet. So, if you do not want a thermometer that does not permanently sit in the water, then this is the best one for you. You just add a probe to your tank when you want to check the temperature of the water in the aquarium and then remove it ones you are done. Actually, it is considered coolest, especially if you have the best digital thermometer.

Pros

•    Reading can be taken in any location with a single meter

•    Unbreakable

•    Alert feature when the temperature is out of range

•    Not impacted by ambient room temperature

•    Easy to read

•    Generally the most accurate type

Cons

•    Most expensive type

•    Most require batteries to run

Under the digital thermometer and probe, we have two types, which are as described below;

i. Fixed probe thermometer

This thermometer is often referred to as instant-read thermometer. This type of thermometer is normally identified by a meter that is directly attached to the sensor probe. When using it, you just dip the probe into the water, and you will get your results in seconds.

The good thing with this fixed probe thermometer is that it takes up a little space which allows it not to be easily noticed in your aquarium cabinet until the next time you want to know the temperature of your aquarium.  But if you have a downside fixed probe aquarium, you will have to hold it with your hands when taking the temperature reading of your aquarium or else the thermometer will sink into the water.

Pros

  • Easy to read
  • Takes up little space

Cons

  • Does not have alerts

 

ii. Wired probe thermometer

wired probe thermometerThis is the most advanced one. A probe is separated from the meter and connected with a cord. This allows you to permanently set up the probe inside the water while the meter is outside displaying the current temperature reading of the temperature. So, with this type of thermometer, you can continuously monitor the temperature of your water by putting it anywhere on the surface of the water. This type of thermometer is advanced that it can raise the alarm even with the slightest change in the temperature. Also, this type of thermometer does not take up much of your space in your aquarium cabinet.

Pros

  • It can be placed anywhere on the surface of the water
  • It has an alarm system
  • Does not take up much space

Cons

  • Expensive
  • Require batteries to run

While it might look like all the digital aquarium thermometers are expensive, one can get a reliable digital aquarium thermometer that is cheap.

2. Submersible aquarium thermometer

This type of thermometer lives inside the water with your fish and plants. These thermometers are designed to remain inside the water. So, anytime you want to check the temperature of water, you will have to peer inside a great hands-free way. The problem with this thermometer is that it takes up a large space in your aquarium but space won’t be a problem in large tanks.

This type of thermometer is most commonly made if glass. However, there are those thermometers that are operated by batteries which are made of plastic though they are less common.

When it comes to the price of aquarium thermometers, submersible thermometers are the cheapest. In fact, you can have this type of thermometer with just a few dollars. But you need to know that Submersible thermometers are not recommended in aquariums which have aggressive fish as they are most commonly made of glass and therefore, can break when fish hit them.

Pros

•    Inexpensive

•    They operate without batteries

Cons

•    They are hard to read

•    They are fragile

i. Floating submersible thermometer

Floating submersible thermometerAs the name of the thermometer indicates, this type of thermometer floats on the surface of the water in your aquarium. This sounds great. Isn’t it? When the thermometer floats in the water, it takes up the least space. The problem with this is that it can spin with the slightest movement of water making it impossible to read the temperature of the water as you can only read it front on.

The other problem with this type of thermometer is that the filters of the thermometer can push it around until they get stuck in one corner of the tank. Also, when you have decorations or plants on your aquarium, you can’t be able to take the reading of the thermometer easily. So, the only thing to do when you want to take the reading of this type of thermometer is to take it with your hands which is not practical.

Pros

•    Many have easily viewable “safe” zone

•    Can be placed in multiple locations

•    Inexpensive

•    Not impacted by ambient room temperature

Cons

•    Breakable

•    Less accurate than digital

•    The scale may be difficult to read

•    No alert feature

ii. Standing submersible thermometer

Standing submersible thermometerThis type of thermometer is weighed allowing it to sink inside the tank, but it can be able to stand upright when it reaches the bottom. So, what you need to do is to glance through the front of the aquarium in order to take the temperature reading of the thermometer. The problem with this type of thermometer is that it can be very hard to read especially when placed near the rear of the aquarium. But if you have a small aquarium, then you won’t get any problem reading from any point of the aquarium.  The other problem with this type of thermometer is that fish can easily hit it making it topple over forcing you to use your hands to make it stand upright again.

Pros

•    Inexpensive

•    Not impacted by ambient room temperature

•    Can be placed in multiple locations

•    Many have easily viewable “safe” zone

Cons

•    Scale may be small and difficult to read

•    Breakable

•    No alert feature

•    Less accurate than digital

iii. Suction cup submersible thermometer

Suction cup submersible thermometerThis is the best type of submersible thermometer. By attaching the cup of the thermometer to the glass of the aquarium, you can be sure that the thermometer will remain in the same position until the next time to check the reading of the thermometer. The good thing with this type of thermometer is that you can attach the cup anywhere in the aquarium. If you do not like the suction cup, then there are those that use the magnet to attach to the walls of the aquarium though they are less common.

 

 

 

 

Pros

•    It offers accurate readings.

•    It’s very affordable.

•    It doesn’t need batteries.

Cons

•    can be hard to read

•    Don’t use the suction cup on acrylic tanks, as it will leave ring stains that will prove very difficult to remove.

3. Thermometer sticker strips

This type of thermometers are often referred to as LCD thermometers. The liquid in the thermometer can be able to change the color when the temperature of water changes. You just peel a sticker and attach it to the front of the aquarium and it will be able to sense the temperature of water through the glass. Isn’t it nice? The only problem with this type of thermometer is that the sticker is attached outside the aquarium meaning that its temperature change can be influenced by the temperature of the room. So, who wants inaccurate reading?  Also, stickers have limited lifetime. Do you still want it?

Pros

•    Easy to apply

•    Inexpensive

•    Unbreakable

•    Can be placed in multiple locations

Cons

•    No alert feature

•    Can be difficult to read in low light

•    Less accurate than digital

Digital vs. analog thermometer

Which one is the best for your aquarium? The old fashioned thermometer which you need to match the temperature reading is the analog thermometer. Actually, matching the reading of the thermometer is not necessary. Why can’t you just get temperature reading of your thermometer by just a glance? Actually, digital thermometers are so precise and can even be read by the oldest eyes. Therefore, digital thermometers are the best. Do yourself a favor and get one.

Advantages of digital thermometer

•    Accurate

•    Easily available

•    Have alarm system

•    Easy to read

Disadvantages

•    Expensive

•    Require batteries to operate

•    Not all are accurate

•    Some are hard to clean

Advantages of analog thermometer

•    Inexpensive

•    They do not require batteries to operate

Disadvantages

•    Inaccurate

•    Hard to read

•    Does not have alarm system