Hydor External Inline Aquarium Heaters are great thermal aquarium heaters which includes the PTC system. Suitable for all external canister filters. No danger of damage if the equipment is left running without water for a short period of time.

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Hydor Mini Aquarium Heaters are Aquarium Heaters designed for small fish bowls. It's extra small design makes it easy to hide in mini-tanks and bowls, even under gravel! These Aquarium Heaters are completely submersible and ideal for use in both glass and acrylic tanks!

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