Your fish will have a risk of fall ill and could die if the temperature in the tank sudden changer and out of their safe level.
Each type of fish requires different temperatures. Even though you have a heater to keep the water warm. But how do you know if it is at the temperature you want.
That way you will need the fish tank thermometer in order to maintain ting the internal environment of your aquarium. Thermometers come in many types, so it can be difficult to know what will be the best for your tank.
#1 Stick on thermometers
Stick on thermometers are usually use in the freshwater tanks, because this type of thermometer may come with the fish tank kit for the beginner. Stick on the thermometer is accurate enough to use if you are do not have much of a requirement.
It is easy to use, versatile because you can use it not only for a fish tank. Especially it is not expensive.
Because this thermometer is stock outside the tank, so there is maybe the effect of the temperature surrounding this type of thermometer.
Besides, if you are using a glass tank, the thickness of glass also can affect the accuracy of this thermometer.
Therefore, when using a stick-on thermometer, notice that you do not place it under the lamp of direct sunlight.
Also do not stick it near a heater, chiller, vent. Moreover, this thermometer will read better when observer straight on, so placing it where you easy to read most.
This is the best aquarium thermometers for those who have a limited budget.
#2 Floating or standing thermometer
This type of thermometer is placed inside the tank, measuring directly the water temperature. This is cheap and accurate.
But the outstanding drawback of it is that this thermometer made of glass so it more fragile than other thermometers. It might not the good option to choose for fish tank thermometer. Once it breaks, it can cause some dangerous for your fish.
#3 Digital Thermometers
There are two parts of digital thermometer are probe (placed inside the aquarium water) connects with the digital display outside the tank. it can be wireless or wire.
There are some extra function can come with digital thermometer such as timer or audible alert feature, which will warn you when the temperature go down or raise up out of the desired range. The cons of this thermometer is that it quite expensive and require batteries to run.