Temperature Control

Items 1 to 48 of 89 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.
  • Coralife Battery Operated Digital Thermometer
    • Bring home your easy-to-read, clear display thermometer
    • It is designed to work with standard terrariums & aquariums
    • Temperature ranges from -10 to +140 degrees Fahrenheit
    • This thermometer will read in both Fahrenheit and Celsius
    • The battery, suction cup and probe cord are all included

    Regular Price: USD 7.29

    Sale Price USD 5.99

    Regular Price: USD 7.29

    Sale Price USD 5.99

  • 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

    Sale Price USD 1.59

    Regular Price: USD 2.39

    Sale Price USD 1.59

  • 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
  • Underwater Treasures Digital Thermometer
    • Displays temperatures in both Fahrenheit & Celsius
    • Gives an accurate and easy-to-read green indicator
    • This Thermometer ranges from 18-34°C & 64-93°F

    Regular Price: USD 2.49

    Sale Price USD 1.49

    Regular Price: USD 2.49

    Sale Price USD 1.49

  • 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 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

  • Zoo Med Digital Aquarium Thermometer
    • Simple to read with luxury LCD Display
    • Completely submersible & waterproof
    • Ideal for fresh & salt water aquariums
    USD 6.99
    USD 6.99
  • Underwater Treasures Easy Read Thermometer
    • Designed for use inside of your aquarium
    • Provides you with a secure suction cup mount
    • Battery operated, compact & submersible
    • Provides constant, accurate readings to ±1°F
    • The solid plastic casing helps prevent breakage
    USD 6.89
    USD 6.89
  • 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

  • Cobalt Aquatics Neo-Therm Dual Heater - 300 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
    USD 119.23
    USD 119.23
  • 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
  • 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

  • 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
  • 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

  • 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

  • Eheim Jager TruTemp Submersible Heater - 75 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups
    USD 24.99
    USD 24.99
  • Eheim Jager TruTemp Submersible Heater - 125 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups
    USD 28.99
    USD 28.99
  • Eheim Jager TruTemp Submersible Heater - 300 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups

    Regular Price: USD 34.99

    Sale Price USD 23.99

    Regular Price: USD 34.99

    Sale Price USD 23.99

  • 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

  • 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

  • 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

  • Eheim Jager TruTemp Submersible Heater - 150 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups

    Regular Price: USD 29.99

    Sale Price USD 21.99

    Regular Price: USD 29.99

    Sale Price USD 21.99

  • 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 - 100 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups

    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 - 50 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups

    Regular Price: USD 23.99

    Sale Price USD 17.99

    Regular Price: USD 23.99

    Sale Price USD 17.99

  • 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

    Sale Price USD 26.99

    Regular Price: USD 29.99

    Sale Price USD 26.99

  • 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

  • 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

  • Eheim Jager TruTemp Submersible Heater - 200 W
    • Features a shatterproof glass construction
    • TruTemp dial adjusts from 18° to 34° C (65° to 93° F)
    • Thermo safety control enables "running dry" protection
    • On/off indicator light verifies heater functions
    • Includes mounting bracket and suction cups

    Regular Price: USD 32.99

    Sale Price USD 22.99

    Regular Price: USD 32.99

    Sale Price USD 22.99

  • 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

    Sale Price USD 429.99

    Regular Price: USD 459.99

    Sale Price USD 429.99

  • 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

  • Cobalt Aquatics Accu-Therm Heater - 200 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 31.99
    USD 31.99
  • Hydor Theo Submersible Heater - 50 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 24.99

    Sale Price USD 18.99

    Regular Price: USD 24.99

    Sale Price USD 18.99

  • 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

    Sale Price USD 32.99

    Regular Price: USD 35.99

    Sale Price USD 32.99

  • 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-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

  • 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

  • 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.
    USD 16.99
    USD 16.99
  • 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 - 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

    Out of stock

  • 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

  • Aqueon Preset Heater - 50 W
    • Pre-calibrated to an accurate 78&‌deg; F, accurate to 1&‌deg; degrees fahrenheit and require no manual adjustment. Appropriate for most tropical fish, these fully submersible heaters are made using shatter-resistant quartz glass for added durability. A red LED lightr indicates that the heater is active, and an automatic shut-off feature works to prevent overheating. Aqueon Preset Heaters are available in 50-Watt, 100-Watt, 150-Watt and 200-Watt models, and come backed by a 1 Year Manufacture
    • Appropriate for most tropical fish and fully submersible
    • Made using shatter-resistant quartz glass for added durability
    • Automatic shut-off feature prevents overheating
    • Backed by a 1 Year Manufacturer's Warranty
    USD 10.99
    USD 10.99
  • Aqueon Preset Heater - 100 W
    • Pre-calibrated to an accurate 78&‌deg; F, accurate to 1&‌deg; degrees fahrenheit and require no manual adjustment. Appropriate for most tropical fish, these fully submersible heaters are made using shatter-resistant quartz glass for added durability. A red LED lightr indicates that the heater is active, and an automatic shut-off feature works to prevent overheating. Aqueon Preset Heaters are available in 50-Watt, 100-Watt, 150-Watt and 200-Watt models, and come backed by a 1 Year Manufacture
    • Appropriate for most tropical fish and fully submersible
    • Made using shatter-resistant quartz glass for added durability
    • Automatic shut-off feature prevents overheating
    • Backed by a 1 Year Manufacturer's Warranty
    USD 14.99
    USD 14.99
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