Temperature Control

Items 1 to 48 of 82 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.
  • 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

    Sale Price USD 1.59

    Regular Price: USD 2.39

    Sale 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

    Sale Price USD 5.99

    Regular Price: USD 7.29

    Sale Price USD 5.99

  • 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

    Sale Price USD 1.49

    Regular Price: USD 2.49

    Sale Price USD 1.49

  • 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

    Sale Price USD 8.99

    Regular Price: USD 12.99

    Sale Price USD 8.99

  • 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

    Sale Price USD 6.49

    Regular Price: USD 7.99

    Sale Price USD 6.49

  • 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

    Sale Price USD 26.99

    Regular Price: USD 29.99

    Sale Price USD 26.99

  • Aqueon Aquatic Flat Heater - 7.5 W
    • Ideal for small desktop aquariums up to 3 gallons
    • Energy-efficient heater consumes a mere 7.5 watts!
    • Easy to install with submersible design and suction cups
    • Secures to the sides or bottom of your aquarium
    USD 8.99
    USD 8.99
  • 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

    Sale Price USD 3.49

    Regular Price: USD 5.49

    Sale 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

    Sale Price USD 8.99

    Regular Price: USD 11.99

    Sale Price USD 8.99

  • 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

    Sale Price USD 19.99

    Regular Price: USD 24.99

    Sale Price USD 19.99

  • Aqueon Aquatic Flat Heater - 15 W
    • Ideal for small desktop aquariums up to 10 gallons
    • Energy-efficient heater consumes a mere 15 watts!
    • Easy to install with submersible design and suction cups
    • Secures to the sides or bottom of your aquarium
    USD 10.99
    USD 10.99
  • Chill Solutions Thermoelectric Aquarium Chiller - CSXC-1
    • Accurate, active cooling for aquariums up to 30 gallons
    • Uses thermoelectric technology to cool without refrigerants
    • Incredibly compact, quiet, reliable, and easy to use!
    • Features a fully proportional thermostat (45°F - 90°F)
    • Ideal for nano reef aquariums, cold water aquariums, etc.
    USD 219.99
    USD 219.99
  • Marina Suction Cups for Heaters (up to 3/4" dia.) - 2 pk
    Marina Suction Cups are designed to hold heaters measuring up to 3/4" in diameter. Powerful, long-lasting suction keeps your heater securely in place.

    Regular Price: USD 0.99

    Sale Price USD 0.79

    Regular Price: USD 0.99

    Sale Price USD 0.79

  • 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

    Sale Price USD 19.99

    Regular Price: USD 28.99

    Sale Price USD 19.99

  • Penn Plax Heater Holder Suction Cups - 2 pk
    Heaters Holders & Guards. Penn Plax Suction Cup Heater Holder for standard sized glass aquarium heaters.

    Regular Price: USD 2.49

    Sale Price USD 2.24

    Regular Price: USD 2.49

    Sale Price USD 2.24

  • 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

    Sale Price USD 17.99

    Regular Price: USD 23.99

    Sale Price USD 17.99

  • Aqueon Submersible Aquarium Heater - 200 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 29.99

    Sale Price USD 19.99

    Regular Price: USD 29.99

    Sale Price USD 19.99

  • Cobalt Aquatics Mini-Therm Heater - 5 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 13.99
    USD 13.99
  • Marineland VisiTherm Deluxe Heater Mounting Bracket
    • Perfect for VisiTherm submersible aquarium heaters
    • Quickly attaches your heater to the aquarium glass
    • Easy-to-use mounting bracket keeps heaters secure
    • Suitable for use with any model of VisiTherm Heater
    USD 4.99
    USD 4.99
  • 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

    Sale Price USD 21.99

    Regular Price: USD 29.99

    Sale Price USD 21.99

  • Lee's Heater Holders - 2 pk
    The Heater Holder features a clip with a suction cup that is to be used to secure 1" heater tubing to the wall of the aquarium. The Heater Holder can also be used to secure 1" siphon or uplift tubes.

    Regular Price: USD 1.19

    Sale Price USD 1.07

    Regular Price: USD 1.19

    Sale Price USD 1.07

  • Aqueon Submersible Aquarium Heater - 100 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 27.99

    Sale Price USD 18.99

    Regular Price: USD 27.99

    Sale Price USD 18.99

  • Cobalt Aquatics Neo-Therm Heater - 25 W
    • Modern, super flat design
    • Easy to set "one touch" system
    • Accurate electronic thermostat (±0.5 degrees F)
    • LEDs display set and actual temperature
    • Shatterproof outer casing protects electrical components

    Regular Price: USD 56.99

    Sale Price USD 37.99

    Regular Price: USD 56.99

    Sale Price USD 37.99

  • Cobalt Aquatics Neo-Therm Heater - 100 W
    • Modern, super flat design
    • Easy to set "one touch" system
    • Accurate electronic thermostat (±0.5 degrees F)
    • LEDs display set and actual temperature
    • Shatterproof outer casing protects electrical components

    Regular Price: USD 62.99

    Sale Price USD 42.99

    Regular Price: USD 62.99

    Sale Price USD 42.99

  • 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

    Sale Price USD 49.99

    Regular Price: USD 57.99

    Sale Price USD 49.99

  • 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

    Sale Price USD 25.99

    Regular Price: USD 29.99

    Sale Price USD 25.99

  • 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

    Sale Price USD 17.99

    Regular Price: USD 23.99

    Sale Price USD 17.99

  • 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

    Sale Price USD 19.99

    Regular Price: USD 27.99

    Sale Price USD 19.99

  • 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

    Sale Price USD 23.99

    Regular Price: USD 33.99

    Sale Price USD 23.99

  • Marina Suction Cups for Thermometers/Airline Tubing - Small - 2 pk
    Marina Small Thermometer Suction Cups can be used for securing thermometers and airline tubing within your aquarium environment.

    Regular Price: USD 0.99

    Sale Price USD 0.79

    Regular Price: USD 0.99

    Sale Price USD 0.79

    Out of stock

  • Hagen Heater Holder/Hose Bracket
    Plastic Heater Holder for Thermal Compact / Thermal Pre-set. Also for Fluval 104 and 204

    Regular Price: USD 2.99

    Sale Price USD 2.49

    Regular Price: USD 2.99

    Sale Price USD 2.49

    Out of stock

  • 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

    Sale Price USD 399.99

    Regular Price: USD 459.99

    Sale Price USD 399.99

  • 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

    Sale Price USD 949.99

    Regular Price: USD 1,059.99

    Sale Price USD 949.99

  • 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

    Sale Price USD 1,199.99

    Regular Price: USD 1,389.99

    Sale Price USD 1,199.99

  • Tetra Submersible Heater - HT-55 - 200 W
    • Submersible glass heater for aquariums 40 to 55 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 24.99

    Sale Price USD 17.99

    Regular Price: USD 24.99

    Sale Price USD 17.99

  • 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

    Sale Price USD 12.99

    Regular Price: USD 15.99

    Sale Price USD 12.99

    Out of stock

  • 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

    Sale Price USD 8.99

    Regular Price: USD 12.99

    Sale Price USD 8.99

    Out of stock

  • 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

    Sale Price USD 14.99

    Regular Price: USD 16.99

    Sale Price USD 14.99

  • 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

    Sale Price USD 18.99

    Regular Price: USD 21.99

    Sale Price USD 18.99

  • 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

    Sale Price USD 19.99

    Regular Price: USD 24.99

    Sale Price USD 19.99

  • 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

    Sale Price USD 21.99

    Regular Price: USD 25.99

    Sale Price USD 21.99

  • 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

    Sale Price USD 21.99

    Regular Price: USD 26.99

    Sale Price USD 21.99

  • 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

    Sale Price USD 24.99

    Regular Price: USD 28.99

    Sale Price USD 24.99

  • 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

    Sale Price USD 39.99

    Regular Price: USD 46.99

    Sale Price USD 39.99

  • Zoo Med Bettatherm Mini Size Betta Bowl Heater - 7.5 W
    The Bettatherm Mini Size Betta Bowl Heater is a convenient small, round-size heater that fits most fish or Betta bowls. This fully-submersible heater can be buried under gravel to increase the water temperature 5-10° over ambient room temperature.
    USD 12.99
    USD 12.99

    Out of stock

  • 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

    Sale Price USD 18.99

    Regular Price: USD 24.99

    Sale Price USD 18.99

  • 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

    Sale Price USD 24.99

    Regular Price: USD 31.99

    Sale Price USD 24.99

  • Cobalt Aquatics Neo-Therm Heater - 50 W
    • Modern, super flat design
    • Easy to set "one touch" system
    • Accurate electronic thermostat (±0.5 degrees F)
    • LEDs display set and actual temperature
    • Shatterproof outer casing protects electrical components

    Regular Price: USD 57.99

    Sale Price USD 38.99

    Regular Price: USD 57.99

    Sale Price USD 38.99

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