AQUANEAT Aquarium Heater, 25W Small Betta Fish Tank Heater, Mini Preset Water Thermostat with a Thermometer

Price: $6.58
(as of Jun 15, 2026 05:25:48 UTC – Details)
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Product description

Cautions:

1. Please confirm that the power supply voltage matches the rated voltage before use.

2. For all the glass heaters, please carefully examine whether there is any damaged part before installation. Do not use it if it has a damaged cord or crack and contact with us.

3. IPX8 design, non-detachable, do not disassemble it, otherwise it will damage the heater.

4. The heater MUST be fully submersed under water before plugged in.

5. Unplug it and wait for at least 10 minutes before changing water or taking the heater out of water; it is forbidden to take it out immediately after unplugged.

6. Do not bury the heater under sand.

Tips for Using Aquarium Heaters:

1. To get an even and thorough heat distribution in the tank, it is recommended to place the heater to an area with good water circulation.

2. The aquarium temp will fluctuate depending of the room’s ambient temp so it is normal that it has differences within ± 3°F, and if the room temp is below 60℉, you need to choose a more powerful heater than recommended in the list.

3. To avoid injury, do not touch the heating part directly.

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Customer Reviews

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4.5 out of 5 stars 2,112

4.2 out of 5 stars 4,553

Price

$7.99$7.99 $6.28$6.28 $6.98$6.98 $26.99$26.99 $6.99$6.99 $5.99$5.99

Size
6.75″x 0.8″x 0.8″ 2.75“ x1.5” x1.25“ 4″ x2.75″ x1.5″ 8”x5.25”x7” 1.4″D X 2.4″H, 0.4″ 2″ x 1.75″ x 1.25″

Package Dimensions ‏ : ‎ 5.35 x 2.64 x 2.4 inches; 4.66 ounces
Item model number ‏ : ‎ G405
Date First Available ‏ : ‎ July 20, 2023
Manufacturer ‏ : ‎ AQUANEAT
ASIN ‏ : ‎ B0CCD6PX96
Best Sellers Rank: #3,383 in Pet Supplies (See Top 100 in Pet Supplies) #5 in Aquarium Heaters
Customer Reviews: 4.4 4.4 out of 5 stars (1,169) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Mini Size: The heater is only 4.5” in length making it a great choice for small sized tanks from 3 to 5.5 gallons without taking up much space and obscuring the viewing area.
Easy to Use: The small 25W aquarium heater is preset to 78°F which is a perfect temp for Betta and most of other tropical fishes, and no extra setup needed just plug and play.
Easy to Check: The indicator light turns red when it is heating and it turns green when it is resting so it is easier to do a quick check every day.
Includes: 1x 25W Small Aquarium Heater, 1x Suction Cup, 1x Free Thermometer Strip
Cautions: Always keep it fully submerged under water before plugged in, and unplug it and wait for at least 10 min before you do aquarium maintenance or take it out of water. Do not touch the heater while it is powered on to avoid scalding