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Coralife Aquarium Chiller
More options available

Price: $509.99 to $1,469.99
Aqueon Pro Submersible 100W Heater
Price: $44.99

Price: $31.49
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Aqueon Pro Submersible 50W Heater
Price: $37.99

Price: $26.59
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Aqueon Submersible Aquarium Heater, 10W
Price: $16.99

Price: $11.89
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Aqueon Preset Heater 50W
Price: $19.99

Price: $13.99
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Aqueon Submersible 150W Heater
Price: $39.99

Price: $27.99
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Aqueon Aquatic Flat Heater 7.5W
Price: $10.99

Price: $7.79
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Aqueon Submersible 100W Heater
Price: $34.99

Price: $24.49
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Aqueon Preset Heater 200W
Price: $34.99

Price: $24.49
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Aqueon Submersible 300W Heater
Price: $49.99

Price: $34.99
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Aqueon Pro Submersible 200W Heater
Price: $54.99

Price: $38.49
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Aqueon Submersible 200W Heater
Price: $44.99

Price: $31.49
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Aqueon Aquatic Flat Heater 15W
Price: $12.99

Price: $9.39
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Aqueon Pro Heaters Submersible Aquarium Heaters
More options available
Price: $49.99 to $59.99

Price: $34.99 to $41.99
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Hydor THEO (UL) Submersible Aquarium Heater 200W
Price: $39.99

Price: $35.39
save 12%
Aqueon Preset Heater 100W
Price: $24.99

Price: $17.49
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Aqueon Preset Heater 150W
Price: $29.99

Price: $20.99
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Hydor THEO (UL) Submersible Aquarium Heater 50W
Price: $29.99

Price: $27.89
save 7%
Hydor THEO (UL) Submersible Aquarium Heater 400W
Price: $49.99

Price: $40.89
save 18%
Hydor THEO (UL) Submersible Aquarium Heater 25W
Price: $29.99

Price: $25.99
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Aqua Euro USA Apex 1/10th HP Aquarium Chiller
Price: $529.99

Price: $481.59
save 9%
Aqueon Submersible 50W Heater
Price: $29.99

Price: $20.99
save 30%
Hydor THEO (UL) Submersible Aquarium Heater 300W
Price: $44.99

Price: $39.09
save 13%
Tropical Heater Kit for biUbe & biOrb
Price: $44.99

Price: $43.49
save 3%

aquarium & fish tank heaters, chillers & thermometers | Petco

Whether you need to keep your tank cool or raise the temperature so it is toasty warm, Petco has the aquarium heater and chillers to keep your water temp just right.

Aquarium heaters are essential equipment for most freshwater or saltwater setups. A fish tank heater is especially necessary if you have popular tropical species like angelfish, blue danios or neon tetras that like basking in warm water, because these species, and many others like them, generally require a water temperature above 74° to thrive. Aquarium heaters also help keep the temp stable, so your community doesn’t have to deal with undue stress or serious health problems. However, even if your fish tank heater indicates degrees, an aquarium thermometer should be used to ensure the reading is accurate. If you have a large tank, you may need two smaller fish tank heaters at opposite ends of your setup. Doing this helps maintain a stable temperature throughout your habitat, so no matter which side your tang or triggers take to, they’ll be comfortable.

Some aquatic pets like to hang out in cooler climates. For species like goldfish, loaches and some barbs, a chiller helps keep their water conditions at an optimal temperature. Especially since some equipment like UV sterilizers, water pumps and lights can heat the tank higher than desired. During the summer months, you may also need an aquarium chiller to keep conditions comfortable for your gilled guys and gals. And just like with an aquarium heater, using a thermometer ensures that your tank is as cool as a sea cucumber.

Dip into Petco for a wide selection of aquarium heaters and chillers to make your habitat homey for your finned family members.