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Summer Sale! Use code SUMMER26 for 15% off · Free shipping on orders $49+
Summer Sale! Use code SUMMER26 for 15% off our summer collection! Free shipping on orders $49+
Aquarium heaters and thermostats for maintaining optimal water temperature in fish tanks

Fish — Filters & Equipment — Heaters & Thermostats

Keep your fish healthy and comfortable with reliable heaters and thermostats designed for optimal water temperature control. Whether you have tropical fish that need consistent warmth or need precise temperature monitoring, the right heating equipment makes all the difference in creating a thriving aquatic environment.

From adjustable heaters for different tank sizes to digital thermostats that maintain perfect conditions, these essential tools help prevent temperature fluctuations that can stress your fish. Browse our selection to find the ideal heating solution for your aquarium setup.

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Black aquarium heater with digital temperature controller displaying 78.1°F connected by cord
Black aquarium heater with silver tube and digital temperature controller displaying 78.1 Sale Sale

Smart 100W Aquarium Heater with Digital Display

$99.07
$99.07 - $99.07
$99.07
$43.95
$43.95 - $43.95
$43.95
in stock

Why you'll love itKeep your fish happy and healthy with precise temperature control that never forgets your settings. This compact 100W heater deli...

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$99.07
$99.07 - $99.07
$99.07
$43.95
$43.95 - $43.95
$43.95
Sale Sale
Black submersible aquarium heater with digital temperature controller showing 68 degrees and
Black digital aquarium heater with temperature controller displaying 68 degrees and betta fish Sale Sale

HITOP 400W Digital Aquarium PTC Heater

$135.43
$135.43 - $135.43
$135.43
$59.95
$59.95 - $59.95
$59.95
in stock

Why you'll love itKeep your aquatic friends comfortable year-round with this reliable 400W digital heater that maintains perfect water temperatures...

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$135.43
$135.43 - $135.43
$135.43
$59.95
$59.95 - $59.95
$59.95
Sale Sale
Black aquarium heater with suction cups and wired LED thermometer display showing temperature
Black aquarium heater with suction cups and digital thermometer display showing 83.9 degrees Sale Sale

Precise ETL Certified Aquarium Heater with LED Thermometer

$110.09
$110.09 - $110.09
$110.09
$48.95
$48.95 - $48.95
$48.95
in stock

Why you'll love itKeep your aquatic friends comfortable year-round with this ETL certified submersible heater that maintains perfect water temperat...

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$110.09
$110.09 - $110.09
$110.09
$48.95
$48.95 - $48.95
$48.95
Sale Sale
Compact 50W Aquarium Heater with Digital Display
Black Hygger aquarium heater with red digital display showing 86 degrees and control unit Sale Sale

Compact 50W Aquarium Heater with Digital Display

$95.39
$95.39 - $95.39
$95.39
$42.95
$42.95 - $42.95
$42.95
in stock

Why you'll love itKeep your small aquarium at the perfect temperature with precise control and safety features that protect your fish. This compact...

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$95.39
$95.39 - $95.39
$95.39
$42.95
$42.95 - $42.95
$42.95
Sale Sale
Smart Digital Aquarium Heater for Small Tanks
Smart aquarium heater with digital controller showing 28°C display, submerged with betta fish
Sale Sale

Smart Digital Aquarium Heater for Small Tanks

$84.37
$84.37 - $84.37
$84.37
$37.95
$37.95 - $37.95
$37.95
in stock

Why you'll love itKeep your fish happy and healthy with precise temperature control designed specifically for small aquariums. This intelligent hea...

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$84.37
$84.37 - $84.37
$84.37
$37.95
$37.95 - $37.95
$37.95
Sale Sale
Digital aquarium heater system with LCD temperature controller and orange heating rod
Black digital aquarium heater controller with LCD display and orange heating rod on white background
Sale Sale

Digital Aquarium Heater with Temperature Controller

$224.07
$224.07 - $224.07
$224.07
$98.95
$98.95 - $98.95
$98.95
in stock

Why you'll love itThis smart aquarium heater keeps your fish comfortable with precise temperature control and safety features that protect against ...

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$224.07
$224.07 - $224.07
$224.07
$98.95
$98.95 - $98.95
$98.95
Sale Sale
Black retail packaging box for Sicce Jolly Preset plastic aquarium heater showing product
Black retail box packaging for Sicce Jolly Preset plastic aquarium heater with product image
Sale Sale

Sicce 50W Submersible Aquarium Heater

$117.44
$117.44 - $117.44
$117.44
$51.95
$51.95 - $51.95
$51.95
in stock

Why you'll love itKeep your aquatic friends comfortable with this reliable submersible heater that maintains the perfect temperature for your fish ...

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$117.44
$117.44 - $117.44
$117.44
$51.95
$51.95 - $51.95
$51.95
Sale Sale
Black aquarium heater with digital controller showing 18.0 temperature display underwater
Black submersible aquarium heater with digital temperature controller showing 18.0 degrees
Sale Sale

Smart Submersible Aquarium Heater with External Controller

$106.41
$106.41 - $106.41
$106.41
$47.95
$47.95 - $47.95
$47.95
in stock

Why you'll love itKeep your fish happy and healthy with this intelligent aquarium heater that automatically maintains perfect water temperature. Wi...

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$106.41
$106.41 - $106.41
$106.41
$47.95
$47.95 - $47.95
$47.95
Sale Sale
Black aquarium heater rod with blue accent stripe next to digital temperature controller unit
Black aquarium heating rod with blue labeling next to digital temperature controller
Sale Sale

Professional Aquarium Heater with Digital Display

$157.94
$157.94 - $157.94
$157.94
$69.95
$69.95 - $69.95
$69.95
in stock

Why you'll love itKeep your aquatic friends comfortable year-round with precise temperature control and rapid heating technology. Keep reading for ...

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$157.94
$157.94 - $157.94
$157.94
$69.95
$69.95 - $69.95
$69.95
Sale Sale
Black fishkeeper aquarium heater with blue LED strip and digital controller displaying temperature
Black fishkeeper aquarium heater with blue LED strip and digital controller displaying temperature
Sale Sale

Smart 1000W Aquarium Heater with LED Controller

$202.03
$202.03 - $202.03
$202.03
$89.95
$89.95 - $89.95
$89.95
in stock

Why you'll love itKeep your fish healthy with precise temperature control and advanced safety features that automatically protect your aquatic frie...

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$202.03
$202.03 - $202.03
$202.03
$89.95
$89.95 - $89.95
$89.95
Sale Sale
Smart 500W Digital Aquarium Heater
Black digital aquarium heater with temperature controller and submersible heating element

Smart 500W Digital Aquarium Heater

$150.59 - $150.59
$150.59
$150.59
$150.59 - $150.59
$150.59
in stock

Why you'll love itKeep your fish happy with precise temperature control that stays exactly where you set it. This smart heater prevents disasters w...

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$150.59 - $150.59
$150.59
$150.59
$150.59 - $150.59
$150.59
Green digital aquarium heater with controller showing temperature display and cylindrical heater
Green digital aquarium heater with LED temperature display and cylindrical heating element
Sale Sale

Precise Digital Aquarium Heater with LED Display

$139.57
$139.57 - $139.57
$139.57
$61.95
$61.95 - $61.95
$61.95
in stock

Why you'll love it This advanced aquarium heater combines precision temperature control with innovative safety features to keep your fish happy and...

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$139.57
$139.57 - $139.57
$139.57
$61.95
$61.95 - $61.95
$61.95
Sale Sale
Gray digital aquarium heater with 86.8°F temperature display mounted in tropical fish tank
Gray digital aquarium heater with 86.8°F display and control dial next to fish tank with plants
Sale Sale

Digital Submersible 100W Aquarium Heater

$146.83
$146.83 - $146.83
$146.83
$64.95
$64.95 - $64.95
$64.95
in stock

Why you'll love it Keep your aquatic friends comfortable with precise temperature control and smart safety features. This digital heater prevents o...

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$146.83
$146.83 - $146.83
$146.83
$64.95
$64.95 - $64.95
$64.95
Sale Sale
Black aquarium heater with digital controller showing red display and protective cage guard
Black Hygger aquarium heater with digital display showing 88 and cylindrical heating element
Sale Sale

Compact 25W Adjustable Aquarium Heater

$84.37
$84.37 - $84.37
$84.37
$37.95
$37.95 - $37.95
$37.95
in stock

Why you'll love itKeep your fish happy and healthy with precise temperature control that actually works. This compact heater fits seamlessly into s...

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$84.37
$84.37 - $84.37
$84.37
$37.95
$37.95 - $37.95
$37.95
Sale Sale
Black aquarium heater submerged underwater with colorful betta fish and temperature scale display
50W adjustable aquarium heater submerged in water with temperature scale and colorful betta fish
Sale Sale

50W Adjustable Aquarium Heater

$62.33
$62.33 - $62.33
$62.33
$27.95
$27.95 - $27.95
$27.95
in stock

Why you'll love itKeep your fish comfortable year-round with this smart 50W submersible heater that automatically maintains the perfect water tempe...

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$62.33
$62.33 - $62.33
$62.33
$27.95
$27.95 - $27.95
$27.95
Sale Sale
EHEIM Jager TruTemp aquarium heater in white retail packaging showing product details and specs
EHEIM Jager TruTemp 100W aquarium heater in retail packaging showing product specifications
Sale Sale

EHEIM Jager Aquarium Thermostat Heater 100W

$135.81
$135.81 - $135.81
$135.81
$60.95
$60.95 - $60.95
$60.95
in stock

Why you'll love itKeep your aquatic friends comfortable with precise temperature control that actually works. This fully submersible heater deliver...

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$135.81
$135.81 - $135.81
$135.81
$60.95
$60.95 - $60.95
$60.95
Sale Sale

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