Submersible aquarium heaters made with glass tubes could break in your fish tank. With the ETH in-line fish tank heater, you never have to worry about a broken heater in your fish tank again. The innovative, worry-free design connects directly to the tubing of your canister filter or sump so there is no danger at all. A state-of-the-art PTC system combined with a polymer sheet silk screened with heating ink (similar to your car's windshield defroster) allows the heater to be left on without water for a short time without damage. Also includes a highly accurate, adjustable heating control.
Phenomenal! The *only* heater I'll ever buy! 12/2/2012
I bought this in-line heater maybe 4 years ago and it's amazing! Finally, absolutely consistant heat throughout all parts of the tank. Spot on temperature control--it has not wavered a single degree! This heater is such a bargain and you'll wonder why you ever relied on hang-on-the-tank heaters. The company makes really well made products. A tank's temperature can play such a large part in the health and lifespan of your fish and plants. Finally, enjoy fish keeping without the worry!
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