Temperature Control

Items 1 to 48 of 94 total

Each species of fish has specific needs when it comes to temperature. For fish keepers, getting the right aquarium temperature is a breeze when you use one of these reliable temperature control products from Big Al’s Pets. Each one is designed to take the guesswork out of temperature regulation in your aquarium. You’ll be able to quickly and easily create settings for how warm or cool your fishes’ water needs to be. We carry the latest precision devices to provide you with more control over your aquarium water temperature while also helping to maintain optimal living conditions for your fish.

Our selection of aquarium temperature control products includes a number of devices that any fish keeper may need for their aquarium. Our thermometers provide you with accurate readings, while our heaters and chillers make sure that your water temperature is maintained with accuracy and stability. We also carry helpful accessories for setting up your aquarium temperature control devices, including magnetic suction cups and brackets. At Big Al’s Pets, you can get everything you need for your aquarium with a convenient, one-stop shopping experience.
  • Eheim Jager TruTemp Submersible Heater - 100 W
    An ultra-modern thermal device using the best available technology. The temperature can be precisely adjusted from 18-34°C and readjusted if required. The control accuracy is +/- 0.5 degrees F, and the heat is controlled to a constant temperature.

    Regular Price: USD 27.99

    Special Price USD 19.99

    Regular Price: USD 27.99

    Special Price USD 19.99

  • Eheim Jager TruTemp Submersible Heater - 150 W
    An ultra-modern thermal device using the best available technology. The temperature can be precisely adjusted from 18-34°C and readjusted if required. The control accuracy is +/- 0.5 degrees F, and the heat is controlled to a constant temperature.

    Regular Price: USD 29.99

    Special Price USD 21.99

    Regular Price: USD 29.99

    Special Price USD 21.99

  • Eheim Jager TruTemp Submersible Heater - 300 W
    An ultra-modern thermal device using the best available technology. The temperature can be precisely adjusted from 18-34°C and readjusted if required. The control accuracy is +/- 0.5 degrees F, and the heat is controlled to a constant temperature.

    Regular Price: USD 34.99

    Special Price USD 24.99

    Regular Price: USD 34.99

    Special Price USD 24.99

  • Zoo Med Aqua Cool Aquarium Cooling Fan
    • A very affordable alternative to expensive chillers
    • Dissipates radiant heat generated by aquarium lamps
    • Reduces water temperature through evaporative cooling
    • Features a wide, multi-directional discharge nozzle
    • Includes low voltage, energy efficient power source

    Regular Price: USD 24.99

    Special Price USD 19.99

    Regular Price: USD 24.99

    Special Price USD 19.99

  • Coralife Aquarium Chiller - 1/10 HP
    • Provides accurate temperature control with quality construction
    • Keeps water within +/- 2 degrees F of set temperature
    • Titanium heat exchanger will not corrode over time
    • Easy to use, programmable LED display
    • Includes 1 year limited manufacturer's warranty

    Regular Price: USD 459.99

    Special Price USD 399.99

    Regular Price: USD 459.99

    Special Price USD 399.99

  • Eheim Jager TruTemp Submersible Heater - 250 W
    An ultra-modern thermal device using the best available technology. The temperature can be precisely adjusted from 18-34°C and readjusted if required. The control accuracy is +/- 0.5 degrees F, and the heat is controlled to a constant temperature.

    Regular Price: USD 33.99

    Special Price USD 23.99

    Regular Price: USD 33.99

    Special Price USD 23.99

  • Underwater Treasures Floating Glass Thermometer
    Floating Glass Thermometer is accurate and easy to read. It displays temperature in both °C and °F, and is great for freshwater and marine systems. This fully submersible thermometer can be secured with included suction cup or can float freely.

    Regular Price: USD 2.39

    Special Price USD 1.59

    Regular Price: USD 2.39

    Special Price USD 1.59

  • Coralife Battery Operated Digital Thermometer
    This digital thermometer is ideal for both aquariums and terrariums. Temperature ranges from -10 to +140 degrees Fahrenheit. Mounting suction cups and battery included. 39 inch long temperature probe cord. Also reads in Celsius.

    Regular Price: USD 7.29

    Special Price USD 5.99

    Regular Price: USD 7.29

    Special Price USD 5.99

  • Hydor ETH 300 In-Line Heater - 5/8" - 300 W
    The self-limiting PTC heating element guarantees maximum safety against any risk of overheating. The exclusive technology and the high quality of the components guarantee a long lasting product.

    Regular Price: USD 59.99

    Special Price USD 47.99

    Regular Price: USD 59.99

    Special Price USD 47.99

  • Eheim Jager TruTemp Submersible Heater - 200 W
    An ultra-modern thermal device using the best available technology. The temperature can be precisely adjusted from 18-34°C and readjusted if required. The control accuracy is +/- 0.5 degrees F, and the heat is controlled to a constant temperature.

    Regular Price: USD 32.99

    Special Price USD 22.99

    Regular Price: USD 32.99

    Special Price USD 22.99

  • Marineland Precision Submersible Heater - 300 W
    • Powerful submersible heater for aquariums up to 80 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 28.99

    Special Price USD 22.99

    Regular Price: USD 28.99

    Special Price USD 22.99

  • Aqueon Pro Submersible Heater - 250 W
    Aqueon Pro Heaters are accurate, reliable, durable, and easy to use. They are constructed using a shatterproof and nearly indestructible outer shell, and feature a durable aluminum core for strength and even heat distribution. Fully submersible.

    Regular Price: USD 35.99

    Special Price USD 30.59

    Regular Price: USD 35.99

    Special Price USD 30.59

  • Zoo Med Mag-Clip Magnetic Suction Cups
    • Industrial strength magnetic suction cup system
    • Includes 6 assorted sizes of nylon clips
    • Ideal for holding heaters, airline tubing, spray bars, etc.
    • Never replace your suction cups again!

    Regular Price: USD 7.99

    Special Price USD 5.99

    Regular Price: USD 7.99

    Special Price USD 5.99

  • Eheim Jager TruTemp Submersible Heater - 50 W
    An ultra-modern thermal device using the best available technology. The temperature can be precisely adjusted from 18-34°C and readjusted if required. The control accuracy is +/- 0.5 degrees F, and the heat is controlled to a constant temperature.

    Regular Price: USD 23.99

    Special Price USD 17.99

    Regular Price: USD 23.99

    Special Price USD 17.99

  • Underwater Treasures Easy Read Thermometer
    This battery operated thermometer is compact and fully submersible. It provides constant, accurate readings to +/- 1 degree Fahrenheit, and has a solid plastic casing to help prevent breakage.

    Regular Price: USD 6.89

    Special Price USD 4.99

    Regular Price: USD 6.89

    Special Price USD 4.99

  • Hydor ETH 200 In-Line Heater - 1/2" - 200 W
    The self-limiting PTC heating element guarantees maximum safety against any risk of overheating. The exclusive technology and the high quality of the components guarantee a long lasting product.

    Regular Price: USD 57.99

    Special Price USD 46.99

    Regular Price: USD 57.99

    Special Price USD 46.99

  • Tetra Submersible Heater - HT-10 - 50 W
    • Submersible glass heater for aquariums 2 to 10 gallons in size
    • Electronic thermostat maintains a constant 78±2° F (25±1° C)
    • LED indicator enables visual confirmation of heater operation
    • Convenient suction cup mount makes installation a breeze
    • Features a heat and shock-resistant borosilicate glass housing

    Regular Price: USD 12.99

    Special Price USD 8.99

    Regular Price: USD 12.99

    Special Price USD 8.99

  • Aqueon Pro Submersible Heater - 50 W
    Aqueon Pro Heaters are accurate, reliable, durable, and easy to use. They are constructed using a shatterproof and nearly indestructible outer shell, and feature a durable aluminum core for strength and even heat distribution. Fully submersible.

    Regular Price: USD 29.99

    Special Price USD 24.29

    Regular Price: USD 29.99

    Special Price USD 24.29

  • Coralife Aquarium Chiller - 1/2 HP
    • Provides accurate temperature control with quality construction
    • Keeps water within +/- 2 degrees F of set temperature
    • Titanium heat exchanger will not corrode over time
    • Easy to use, programmable LED display
    • Includes 1 year limited manufacturer's warranty

    Regular Price: USD 1,059.99

    Special Price USD 899.99

    Regular Price: USD 1,059.99

    Special Price USD 899.99

  • Fluval E Advanced Electronic Heater - 300 W
    The most technologically advanced heaters available, the Fluval "E" series advanced electronic aquarium heater with VueTech technology delivers piece of mind by continuously displaying real-time water temperature.With an advanced digital microprocessor.
    USD 55.99
    USD 55.99
  • Marineland Precision Submersible Heater - 200 W
    • Powerful submersible heater for aquariums up to 55 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 25.99

    Special Price USD 19.99

    Regular Price: USD 25.99

    Special Price USD 19.99

  • Tetra Submersible Heater - HT-30 - 100 W
    • Submersible glass heater for aquariums 10 to 30 gallons in size
    • Electronic thermostat maintains a constant 78±2° F (25±1° C)
    • LED indicator enables visual confirmation of heater operation
    • Convenient suction cup mount makes installation a breeze
    • Features a heat and shock-resistant borosilicate glass housing

    Regular Price: USD 15.99

    Special Price USD 9.99

    Regular Price: USD 15.99

    Special Price USD 9.99

  • Aqueon Pro Submersible Heater - 200 W
    Aqueon Pro Heaters are accurate, reliable, durable, and easy to use. They are constructed using a shatterproof and nearly indestructible outer shell, and feature a durable aluminum core for strength and even heat distribution. Fully submersible.

    Regular Price: USD 33.99

    Special Price USD 29.69

    Regular Price: USD 33.99

    Special Price USD 29.69

  • Tom Aquatics Temp Alert Digital Thermometer - Fahrenheit
    The Tom Aquarium Temp Alert Thermometers display both aquarium water temperature and room temperature simultaneously. They features 4 programmable alerts, with both audible and LED alarms. Suitable for both freshwater and saltwater applications.

    Regular Price: USD 16.99

    Special Price USD 15.29

    Regular Price: USD 16.99

    Special Price USD 15.29

  • Underwater Treasures Digital Thermometer
    Accurate and easy-to-read, with a reading range of 18-34°C (displays temperature in both °C and °F). It features a green indicator that displays the current temperature. Great for both freshwater and saltwater applications.

    Regular Price: USD 2.49

    Special Price USD 1.49

    Regular Price: USD 2.49

    Special Price USD 1.49

  • Marineland Precision Submersible Heater - 150 W
    • Powerful submersible heater for aquariums up to 40 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 24.99

    Special Price USD 19.99

    Regular Price: USD 24.99

    Special Price USD 19.99

  • Hydor ETH 201 In-Line Heater - 5/8" - 200 W
    The self-limiting PTC heating element guarantees maximum safety against any risk of overheating. The exclusive technology and the high quality of the components guarantee a long lasting product.

    Regular Price: USD 49.99

    Special Price USD 45.99

    Regular Price: USD 49.99

    Special Price USD 45.99

  • Aqueon Pro Submersible Heater - 100 W
    Aqueon Pro Heaters are accurate, reliable, durable, and easy to use. They are constructed using a shatterproof and nearly indestructible outer shell, and feature a durable aluminum core for strength and even heat distribution. Fully submersible.

    Regular Price: USD 29.99

    Special Price USD 25.19

    Regular Price: USD 29.99

    Special Price USD 25.19

  • Marineland Precision Submersible Heater - 100 W
    • Powerful submersible heater for aquariums up to 29 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 23.99

    Special Price USD 17.99

    Regular Price: USD 23.99

    Special Price USD 17.99

  • Marineland Precision Submersible Heater - 250 W
    • Powerful submersible heater for aquariums up to 70 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 26.99

    Special Price USD 21.99

    Regular Price: USD 26.99

    Special Price USD 21.99

  • Marineland Precision Submersible Heater - 50 W
    • Powerful submersible heater for aquariums up to 12 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 21.99

    Special Price USD 17.99

    Regular Price: USD 21.99

    Special Price USD 17.99

  • Penn Plax Standing Thermometer
    • Penn Plax offers a variety of different styles of Aquarium Thermometers. Aquarium Thermometers are an important component for every aquarium set-up. The provide clear, accurate live temperature readings of your aquarium water's temperature, allowing the aquarium hobbyist to fine tune their heating system to provide the appropriate water temperature for their fish. Economical sinking Thermometer.

    Regular Price: USD 1.99

    Special Price USD 1.79

    Regular Price: USD 1.99

    Special Price USD 1.79

  • Coralife Aquarium Chiller - 1 HP
    • Provides accurate temperature control with quality construction
    • Keeps water within +/- 2 degrees F of set temperature
    • Titanium heat exchanger will not corrode over time
    • Easy to use, programmable LED display
    • Includes 1 year limited manufacturer's warranty

    Regular Price: USD 1,389.99

    Special Price USD 1,199.99

    Regular Price: USD 1,389.99

    Special Price USD 1,199.99

  • Hydor Theo Submersible Heater - 400 W
    THEO aquarium heater has all the necessary features for safe and precise temperature maintance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product.

    Regular Price: USD 29.99

    Special Price USD 25.99

    Regular Price: USD 29.99

    Special Price USD 25.99

  • Penn Plax Stainless Steel Thermometer
    • Penn Plax offers a variety of different styles of Aquarium Thermometers. Aquarium Thermometers are an important component for every aquarium set-up. The provide clear, accurate live temperature readings of your aquarium water's temperature, allowing the aquarium hobbyist to fine tune their heating system to provide the appropriate water temperature for their fish. Stainless Steel Thermometer can be hung from trim of aquarium for your convenience.

    Regular Price: USD 1.99

    Special Price USD 1.79

    Regular Price: USD 1.99

    Special Price USD 1.79

  • Aqueon Submersible Aquarium Heater - 300 W
    Aqueon Submersible Heaters are accurate, reliable, durable and easy to use. Each unit is calibrated twice to ensure accuracy within +/- 1degrees F. Made from thermal shatter-resistant glass designed to absorb impacts.

    Regular Price: USD 31.99

    Special Price USD 19.99

    Regular Price: USD 31.99

    Special Price USD 19.99

  • Aqueon Submersible Aquarium Heater - 50 W
    Aqueon Submersible Heaters are accurate, reliable, durable and easy to use. Each unit is calibrated twice to ensure accuracy within +/- 1degrees F. Made from thermal shatter-resistant glass designed to absorb impacts.

    Regular Price: USD 24.99

    Special Price USD 16.99

    Regular Price: USD 24.99

    Special Price USD 16.99

  • Eheim Jager Heater Double Suction Holder
    Replacement Heater Holder for all Eheim Jager Heaters, complete with rubber suction cups. The heater holder holds the heater away from the aquarium glass allowing for water circulation over the entire unit.

    Regular Price: USD 5.49

    Special Price USD 3.49

    Regular Price: USD 5.49

    Special Price USD 3.49

  • Hydor Slim Heater for Bettas & Bowls - 7.5 W
    • Compact, fully submersible, shock-proof heater
    • Features 90 degree cord angle for best fit in Betta bowls
    • Suitable for 2 to 5 gallon aquariums and bowls
    • UL Listed for safety

    Regular Price: USD 11.99

    Special Price USD 8.99

    Regular Price: USD 11.99

    Special Price USD 8.99

  • Hydor Theo Submersible Heater - 100 W
    THEO aquarium heater has all the necessary features for safe and precise temperature maintance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product.

    Regular Price: USD 22.99

    Special Price USD 17.99

    Regular Price: USD 22.99

    Special Price USD 17.99

  • Marineland Precision Submersible Heater - 400 W
    • Powerful submersible heater for aquariums up to 125 gallons
    • Equally capable in both freshwater and saltwater aquariums
    • Advanced heating element provides even heat distribution
    • Thermal safety switch automatically prevents heater failure
    • cUL Listed and backed by a class-leading lifetime warranty!

    Regular Price: USD 46.99

    Special Price USD 34.99

    Regular Price: USD 46.99

    Special Price USD 34.99

  • Aqueon Mini Heater - 10 W
    The Aqueon 10 W Mini Heater is the perfect size heater for desktop aquariums up to 5 gallons in size. A perfect match for the MiniBows! This cUL approved fully submersible heater is shatterproof and features a thermal safety shut-off.

    Regular Price: USD 12.99

    Special Price USD 8.99

    Regular Price: USD 12.99

    Special Price USD 8.99

  • Aqueon Submersible Aquarium Heater - 150 W
    Aqueon Submersible Heaters are accurate, reliable, durable and easy to use. Each unit is calibrated twice to ensure accuracy within +/- 1degrees F. Made from thermal shatter-resistant glass designed to absorb impacts.

    Regular Price: USD 28.99

    Special Price USD 17.99

    Regular Price: USD 28.99

    Special Price USD 17.99

  • Cobalt Aquatics Accu-Therm Heater - 25 W
    • Advanced, fully submersible heater
    • Equally capable in freshwater and saltwater environments
    • Computer-tested accurate to ± 2 ° Fahrenheit
    • Features an easily calibrated thermostat and Triac circuit
    • Ceramic radiator delivers even heat distribution
    USD 25.99
    USD 25.99
  • Fluval E Advanced Electronic Heater - 200 W
    The most technologically advanced heaters available, the Fluval "E" series advanced electronic aquarium heater with VueTech technology delivers piece of mind by continuously displaying real-time water temperature.With an advanced digital microprocessor.
    USD 53.99
    USD 53.99
  • Hydor Theo Submersible Heater - 25 W
    THEO aquarium heater has all the necessary features for safe and precise temperature maintance of the water in your tank. The exclusive technology and the high quality of the components guarantee a long lasting product.

    Regular Price: USD 17.99

    Special Price USD 15.99

    Regular Price: USD 17.99

    Special Price USD 15.99

  • Cobalt Aquatics Accu-Therm Heater - 50 W
    • Advanced, fully submersible heater
    • Equally capable in freshwater and saltwater environments
    • Computer-tested accurate to ± 2 ° Fahrenheit
    • Features an easily calibrated thermostat and Triac circuit
    • Ceramic radiator delivers even heat distribution
    USD 26.99
    USD 26.99
  • Cobalt Aquatics Mini-Therm Heater - 10 W
    • Compact, fully submersible heater for small aquariums
    • Equally capable in freshwater and saltwater environments
    • Constant operation eliminates the need for adjustments
    • Ceramic radiator delivers even heat distribution
    • Shatterproof polymer casing protects aquarium and heater
    USD 14.99
    USD 14.99
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