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Fish Tank & Aquarium Water Heaters

A quality aquarium water heater is necessary if you intend to maintain a successful tropical freshwater, marine fish or reef system. Temperature fluctuations often go unnoticed by aquarists and can cause stress to fish and corals.

Most fish tank heaters include a built-in thermostat to select the optimal temperature for your aquarium, however, the use of a thermometer to monitor the temperature is highly recommended. You might consider a temperature controller for keeping a stable environment in your aquarium since they offer more precise readings and an advanced feature set.

Most aquarists opt for glass-walled heaters due to their size, price and dependability. Heaters from Jager, Hydor and Aquarium Pharmaceuticals RENA are very popular among hobbyists.

A minimum of 3-5 watts per gallon is recommended to keep aquarium temperatures at an optimal level. Aquarists with larger tanks should consider using more than one heater. In the unlikely event that your heater goes, have multiple heaters in place safeguards your tank from crashing.
Manufacturer
Aquarium Pharmaceuticals RENA Smartheaters Aquarium Water Heaters
The most technically advanced aquarium heater available delivering wide temperature control with LED warning alert system. Made with high quality, durable and unbreakable plastic meeting UL standards.
Azoo Titanium Heaters
Adapts the latest electronic heating control technology. Temperature control range 21~33°C , ±1°C Titanium tube body, free from acid or alkaline corrosion, suitable for both salt water and fresh water aquariums.
Hagen Aquarium Water Heaters
Complete line of submersible heaters for fresh and saltwater applications. Includes the Preset Thermal, Mini Compact and Tronic series of heaters.
Hydor ETH In-Line External Fish Tank Heaters
Designed for external, vertical use in most aquarium applications involving the use of water hose. For use in freshwater and marine aquariums. Fits most canister filters.
Hydor Hydrokable Cable Heating System
A versatile substrate heater designed for use in aquariums and terrariums. Hydroset Electronic Thermostat also available to regulate the temperature of aquariums.
Hydor Mini Aquarium Water Heater
Specially designed for small aquariums and fish bowls from 2 to 5 gallons. It is recommended that the temperature be monitored by the use of a thermometer.
Hydor THEO Submersible Aquarium Water Heaters
Highly accurate due to the use of precise micro-switch technology. UL listed by design, not by the use of accessories. For use in freshwater & marine aquariums.
Jager Heaters
New TS Series heaters are completely waterproof, submersible heaters perfect for freshwater or saltwater use. Heavy duty 2mm thick shock resistant Pyrex glass construction.
JBJ True Temp Fish Tank Heaters
+/- 0.5 F accuracy, a calibration setting, indestructible titanium heating element with thermal shut off, smart memory chip, LED heating indicator, magnetic heater/probe holders, safety guard, remote temperature probe, large constant LED display of the current temperature.
ViaAqua Aquarium Water Heaters
Glass and titanium aquarium heaters for fresh and saltwater applications. Easy to read temperature indicator and compact design are a few of the features of this heater.
Won Brothers Fish Tank Heaters
The Pro-Heat titanium heater is controlled by micro-computer with high precision of ±1°F. Also available, 3-Prong Titanium heating elements.

 

 
 
Accessories
Zoo Med MagClip® Magnetic Suction Cups
Industrial strength MAGNETIC suction cup with interchangeable clips Never replace your suction cups again!
 
 
 
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