Rod or continuous flow heaters are usually used, with floor heaters being less common. The product should always match the aquarium size and should not be too powerful, particularly in smaller tanks.
Rod heaters: It is best to attach the rod heater, for example, the OASE HeatUp, to the rear wall or the side of the aquarium. If possible, it should be installed so that sufficient water can flow around it to heat up without the possibility of fish becoming stuck behind it. The temperature can be adjusted using a control on the upper part. Alternatively, there are thermal filters, such as the OASE BioPlus, FiltoSmartor BioMaster models. They provide filtering and heating in a single unit from outside the aquarium.
Continuous flow heaters: If there is no space in your aquarium or if you do not want to interfere with how it looks, use a continuous flow heater. Place it outside the tank in the filter circuit behind the external filter. The purified water first flows through the heater before it returns to the aquarium.
Floor heaters: The temperature in the aquarium can also be influenced by a floor heater. This is a cable that only becomes slightly warm, such as the HeatUp Basis. It is laid in loops on the floor of the aquarium. This device cannot regulate the temperature of the entire aquarium. Rather, it promotes the natural circulation of water on the floor and supports the growth of plant roots.
Note: This heating element should therefore not be used in Aquascapers with nutrient-rich soil, such as ScaperLine Soil.