External Aquarium Heaters: Mastering Inline Aquarium Thermoregulation

When aquarists refer to external aquarium heaters they usually really mean an inline aquarium heater. An inline aquarium heater is a type of heater that is installed in the pipe system of the external filtration system of an aquarium, rather than being placed inside the tank. It is plumbed into the outflow line and heats the water as it returns to the tank. This type of heater is often preferred by aquarists who want to maintain a clean and clutter-free tank appearance.

One of the major advantages of using an external inline aquarium heater is that it is hidden from view. Unlike submersible heaters that sit inside the tank, inline heaters are installed externally, making them less visible and allowing the focus to be on the beauty of the fish and the overall aesthetics of the tank. This can create a more natural and visually pleasing aquarium environment.

Another benefit of using an inline heater is that it provides precise and even heating throughout the tank. Submersible heaters tend to heat the water closest to the heater more than other parts of the tank, creating temperature variations. With an inline heater, the water flows back into the tank and circulates, distributing the heat evenly. This can help create a more stable and comfortable environment for the fish.

Switching off a submersible heater when performing maintenance or adjusting the temperature can be a hassle. However, with an inline heater, there is no need to unplug or switch off the heater. When the desired temperature is reached, the heater automatically switches off using a built-in thermostat. When the temperature drops, it switches back on, maintaining the desired temperature without the need for manual intervention.

However, there are a few drawbacks to consider when using an inline aquarium heater. One of the main concerns is the price. Inline heaters are generally more expensive than standard submersible heaters. This can be a deterrent for aquarists on a budget or those who are looking for more affordable options. Additionally, if the sump or canister filter fails or is turned off, no water will flow through the inline heater, and the temperature in the tank will drop until the flow returns. This is something to keep in mind to ensure the heater is functioning properly at all times.

When installing an inline aquarium heater, it is recommended to position it in an upright, vertical position to prevent air bubbles and dry spots. This helps to avoid overheating and potential damage to the heater. It is also important to ensure that the heater is properly sized for the tank and the flow rate of the filtration system. Following the manufacturer's instructions and guidelines for installation is crucial to ensure proper functioning and safety.

In conclusion, an inline aquarium heater offers several advantages over traditional submersible heaters. It provides a clean and unobstructed view of the tank and fish, as well as precise and even heating throughout the tank. While it may be more expensive and require careful installation, it can be a worthwhile investment for aquarists looking to maintain a beautiful and well-regulated aquarium environment.

Our illustration shows the Fish Lab inline heater at https://fishlab.com/inline-aquarium-heater/