15 Watt Flat Aquarium Heater.The Aqueon 15 Watt Preset Heater requires no adjusting! The preset temperature has been calibrated to 78°, appropriate for most tropical fish. The Aqueon Flat Heater is for aquariums up to 10 gallons.

50 Watt to 300 Watt Aquarium Heaters.The Fluval M-Series Submersible Heater's range provides exceptional performance, unsurpassed reliability and exclusive mirror technology to blend in with its surroundings. 5 sizes to choose from.

300 Watt to 1000 Watt Aquarium Heaters
The H2Pro Titanium Aquarium Heaters are high quality heaters with a remote temperature controller. The large display shows both the current temperature and the set temperature in either celsius or fahrenheit.

50 Watt to 400 Watt Aquarium Heaters. The Hydor Theo Aquarium Heaters are fully submersible, shatter-proof glass aquarium heaters. Maximum security: THEO is shock resistant thanks to the PTC heating element and the shatterproof glass tube.

The IceCap Magnetic Heater Mounts securely hold aquarium heaters in place with strong magnets, preventing the possibility of the heater resting against equipment, causing it to overheat or worse, float out of the water and run dry.

25 Watt to 300 Watt Aquarium Heaters. These submersible shatterproof Lifegard Aquatics quartz heaters are safe for freshwater and saltwater tanks. Pre-set & adjustable versions. Easy to set thermostat a LED power indicator light showing operation. All heaters are UL listed with a thermal protection shutoff switch.

75 Watt to 400 Watt Aquarium Heaters.The Marineland Precision Submersible heaters comes in five sizes from 75 Watt to 400 Watt. Comes with built-in thermal safety switch. Includes mounting bracket.

25 Watt to 400 Watt Aquarium Heaters. The Oase HeatUp Heaters come in seven sizes from 25 Watt to 400 Watts. They feature a uniform temperature level thanks to patented bi-metal technology.