Some factors have to be considered so that your fish are doing well and the water temperature is optimal at all times. The most important aspect is that you should pay attention to the fishes in your aquarium that prefers the same temperature range. It is also known that much less oxygen is dissolved in warm water than in colder water. This can quickly be fatal to some species of fish or unnecessarily burden it. It is therefore essential to constantly check the water temperature and set it on your heating element (control heater). As a guideline, you should choose a water temperature of 24-28 degrees. Because many well-known fish species feel comfortable in this temperature range. Looking for more aquarium heater recommendations? Visit the link for more.
How To Choose An Aquarium Heater
Heating rod comparison
In most aquariums, a thermostatically controlled rod heater is used to heat the water. The wattage of your heater depends on the water volume. Depending on the size of your aquarium, I recommend an output of 25-300 watts. The golden rule here is that for every 50 liters of water you need 25-50 watts of power. That means the more water an aquarium has, the more energy they need for heating. In most cases, the manufacturers also provide information on the packaging for which volume the device can be used.
Most models have a rotary knob with a temperature scale on which you can set the optimal temperature. There is a clearly visible heating coil in the heating element. Which immediately transfers the heat produced through the glass to the water. Therefore, you should always install this heating system in the aquarium so that sufficient water flows around it. If you ignore this, heat can sometimes build up. This means that the temperature sensor switches off the heating prematurely even though you have not yet reached the desired temperature.
In any case, you should use a water thermometer that is permanently placed in the aquarium. Since the degrees on the temperature scale of the heater are mostly very imprecise. Thus, the water heat can be optimally controlled, especially in the initial phase. Here you should use a digital thermometer. Because most non-digital glass thermometers have a 1-3 degree different temperature display. All rod regulating heaters on the market are also completely waterproof. So that they can also be used deep below the water surface.
Safety and Security
Always read the safety instructions from the manufacturer before using your purchased aquarium heater.
The heating element should always be completely under the water surface so that the thermometer and heater work properly.
Under no circumstances may the heater be taken out of the water while it is in operation! Otherwise, a temperature build-up in the glass cylinder can occur very quickly and the glass could burst.
Before working in the aquarium and reaching into the water with your hand, you should always pull out the power plug of the heating element. This prevents a life-threatening electric shock.