Rena SmartHeater Submersible Aquarium Heater Features:
• LED light blinks to alert you to temperature fluctuations of 5° either way so that you can take appropriate measures.
• Functions as a filter heater as well as an aquarium heater
• Flow-through design allows even circulation of heat
• Temperature ranges form 69-93°F
• Unbreakable design is safe to the touch: even when running
• 6 ft. cord
• UL listed
• Fresh or saltwater application
• 2 Year Manufacturer's warranty

Five Models for Different Tank Sizes
SmartHeater 50w: Up to 20 gal 8"	SmartHeater 100w: up to 35 gal 8"	SmartHeater 150w: 50 gal 9.5"	SmartHeater 200w: Up to 70 gal 11.5"	SmartHeater 300w: Up to 90 gal 13.75"

They deliver the ultimate in easy-set adjustability, shatterproof durability and efficient overheating-protected operation. Sleek, plastic casing makes them easy to hide in the tank.

Efficient to approx 1°F. Easy to read temperature selection dial. Aluminum cylinder distributes core heat evenly.

VisiTherm Stealth Submersible Aquarium Heaters Features:
• "Stealth" design. Casing is dark-colored to help the heater stay unobtrusive in your tank.
• Shuts off automatically when not submerged. Automatically restarts when re-submerged.
• UL listed

Available in sizes to fit all freshwater or marine aquariums up to 75 gallons
Stealth 25w: up to 8 gallons 8.25"	Stealth 50w: up to 15 gallons 8.25"	Stealth 75w: up to 25 gallons 10"	Stealth 100w: up to 30 gallons 10"
Stealth 150w: up to 45 gallons 13.75"	Stealth 200w: up to 55 gallons 13.75"	Stealth 250w: up to 75 gallons 15"

VisiTherm Deluxe Submersible Aquarium Heaters Features:
• Non-Ceramic element means lighter weight and less chance of pulling off the glass.
• Double strength heater housing makes them very durable.
• Marine or Freshwater
• Mounting brackets and 2 suction cups included
• UL listed
• Manufacturer offers lifetime warranty

Available in sizes to fit all freshwater or marine aquariums up to 75 gallons
Visi-Therm 25w: up to 10 gallons 7.5"	Visi-Therm 50w: up to 20 gallons 7.5"	Visi-Therm 75w: up to 25 gallons 10"	Visi-Therm 100w: up to 40 gallons 10"
Visi-Therm 150w: up to 50 gallons 12"	Visi-Therm 200w: up to 65 gallons 12"	Visi-Therm 250w: up to 65 gallons 14"	Visi-Therm 300w: up to 75 gallons 14"

Constructed of shatterproof glass which makes them break resistant under normal circumstances. Models up to 150w are some of the smallest available.

Hydor THEO Submersible Aquarium Heaters Features:
• Easy to read temperature dial changes in 1°F increments.
• PTC heating film (similar to your car's window defroster film) is efficient and enables them to withstand dry conditions for a short time.
• Automatically turns itself off if not submersed.
• Can be installed vertically or horizontally as long as they are submersed.Indicator LED light lets you know when it is functioning.
• 6 Ft power cord
• UL listed
• Freshwater and Marine
• Manufacturer offers 2 year warranty

Seven Models for Different Tank Sizes
THEO 25w: 2-10 gal aquarium 7"	THEO 50w: 5-15 gal aquarium 7"	THEO 100w: 15-30 gal aquarium 9"
THEO 150w: 20-40 gal aquarium 12"	THEO 200w: 25-60 gal aquarium 12"	THEO 300w: 50-80 gal aquarium 15.5"	THEO 400w: 80-100 gal aquarium 15.5"

Tetra Tec HT Submersible Aquarium Heaters Features:
• Saftey shutoff if not submersed
• Extra thick heat and shock resistant borosilicate glass tube
• Double ceramic element to ensure regular conduction of heat through the glass
• 6 Ft power cord
• UL listed
• Freshwater and Marine

Features:
• Safe for fresh or saltwater aquariums
• Wide Temp Range
• Mounting suction cups included.
• Uses one LR43 or AG12 button cell battery (included)