

Hero image 0 of Aqueon Submersible Aquatic Flat Heater Mini Up to 2.5 Gallons, Black, 5 Watts, 0 of 9
Aqueon Submersible Aquatic Flat Heater Mini Up to 2.5 Gallons, Black, 5 Watts
Key item features
- Fully submersible
- Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank
- Quick and easy installation
- Shatterproof construction
- Can be used with glass or acrylic enclosures
- Note: Do NOT operate or leave product plugged in when it is outside of water
- 5 watt works best for up to 2.5 gallon fish tanks
Specs
- FeaturesSubmersible
- Watts5 W
- AccessoriesSuctions cups
- Height8 in
Reviews summary
Pros
- : Suitable for small tank sizes, including 1-3 gallons.
Neutral
- : Can maintain optimal temperature, but may heat slowly or inconsistently.
Generated by AI
Current price is USD$17.14
Price when purchased online
Free 90-day returns
How do you want your item?
Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
Columbus, 43215
Arrives by Tomorrow
.Order within 10 hr 36 min
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
More seller options (1)
Starting from $17.14
About this item
Product details
Aquatic 5 Watt Flat Heaters provide warmth for small tropical fish and are designed for glass or acrylic desktop aquariums up to 2.5 gallons. They are completely submersible, easy to install and efficiently warm aquarium water. Suctions cups are included so you can mount the heater to the bottom or side wall of the aquarium. Be sure to choose the appropriate size for your aquarium. Do not operate or leave product plugged in when it is outside of water. Aqueon products offers a wide range of items so that you can build and maintain a healthy aquatic environment. All the essentials from fish tanks, filters, lighting, food, care, and other supplies that your pet fish needs. We make it easy for you to get your first aquarium and to grow in the hobby as you become more of a fish expert with every step you take and every new thing you learn. For those seasoned hobbyists, we are committed to aquarium product innovation so that we continue to offer products that get you excited. With the Aqueon brand, it's all about the fish.
- Fully submersible
- Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank
- Quick and easy installation
- Shatterproof construction
- Can be used with glass or acrylic enclosures
- Note: Do NOT operate or leave product plugged in when it is outside of water
- 5 watt works best for up to 2.5 gallon fish tanks
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Features
Submersible
Watts
5 W
Accessories
Suctions cups
Height
8 in
Directions
Instructions
Suctions cups are included so you can mount the heater to the bottom or side wall of the aquarium. Can be used with glass or acrylic enclosures. 5 watt best with up to 2.5 gallon aquariums.
Warranty
Warranty information
90 Days
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warnings
State Chemical Disclosure
None
Similar items you might like
Based on what customers bought
Aqueon Submersible Aquatic Flat Heater, Up to 3 Gallons, Black, 7.5 Watts $14.95 Was $18.16
Now$1495current price Now $14.95, Was $18.16$18.16Aqueon Submersible Aquatic Flat Heater, Up to 3 Gallons, Black, 7.5 Watts
144.1 out of 5 Stars. 14 reviewsSave withShipping, arrives in 2 daysAqueon Mini Aquarium Heater, 10 Watts, Up to 5 Gallons $17.95
$1795current price $17.95Aqueon Mini Aquarium Heater, 10 Watts, Up to 5 Gallons
94.7 out of 5 Stars. 9 reviewsSave withShipping, arrives tomorrowBest seller Vibrant Life Betta Aquarium Heater for Fish Tanks up to 3 Gallon, 15 W $13.97
Best seller
$1397current price $13.97Vibrant Life Betta Aquarium Heater for Fish Tanks up to 3 Gallon, 15 W
1024.5 out of 5 Stars. 102 reviewsSave withPickup todayDelivery todayShipping, arrives todayInterpet Heater Flat Life Thermal 15 Watt for up to 4 Gallon Aquarium $13.99
$1399current price $13.99Interpet Heater Flat Life Thermal 15 Watt for up to 4 Gallon Aquarium
2203.5 out of 5 Stars. 220 reviewsSave withShipping, arrives tomorrowDaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker $8.99
$899current price $8.99DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker
1264.2 out of 5 Stars. 126 reviewsSave withShipping, arrives tomorrowMarina Betta Submersible Heater, Black $15.99
$1599current price $15.99Marina Betta Submersible Heater, Black
474.2 out of 5 Stars. 47 reviewsShipping, arrives in 3+ daysAqueon Aquatic Flat Heater [Aquarium, Heaters Submersible] 7.5 watt (3 gallons) $23.46
$2346current price $23.46Aqueon Aquatic Flat Heater [Aquarium, Heaters Submersible] 7.5 watt (3 gallons)
Shipping, arrives in 3+ daysCostyle Submersible Water Vitreous Heater Heating Rod For Aquarium Fish Tank, 25W-300W $12.59
5 optionsAvailable in additional 5 options$1259current price $12.59Options from $12.59 – $13.59Costyle Submersible Water Vitreous Heater Heating Rod For Aquarium Fish Tank, 25W-300W
403.1 out of 5 Stars. 40 reviewsShipping, arrives in 3+ days5W Mini Aquarium Heater USB Charging for Small Fish Tank Heater $7.83
$783current price $7.835W Mini Aquarium Heater USB Charging for Small Fish Tank Heater
34.7 out of 5 Stars. 3 reviewsShipping, arrives in 3+ daysBlarkrus 10W Mini Aquarium Fish Tank Heater USB Heating Rod Submer Heater Thermostat $9.43
$943current price $9.43Blarkrus 10W Mini Aquarium Fish Tank Heater USB Heating Rod Submer Heater Thermostat
Shipping, arrives in 3+ daysBest seller Vibrant Life 50 W Aquarium Heater $15.57
Best seller
$1557current price $15.57Vibrant Life 50 W Aquarium Heater
1064.6 out of 5 Stars. 106 reviewsSave withShipping, arrives today50+ bought since yesterday Vibrant Life 25 Watts Aquarium Heater $12.97
50+ bought since yesterday
$1297current price $12.97Vibrant Life 25 Watts Aquarium Heater
1134.7 out of 5 Stars. 113 reviewsSave withPickup todayDelivery todayShipping, arrives todayTetra Submersible Aquarium Heater, 50-Watts $15.27
3 optionsAvailable in additional 3 options$1527current price $15.27More options from $14.99Tetra Submersible Aquarium Heater, 50-Watts
3993 out of 5 Stars. 399 reviewsSave withShipping, arrives tomorrow1 x Fish Tank Heater-Black $11.88
$1188current price $11.881 x Fish Tank Heater-Black
Shipping, arrives in 3+ daysTELOLY Submersible Aquarium Heater 100W Fish Tank Heater Adjustable Temperature for 5 to 100 Gallon Tank, 1Pcs $13.23
$1323current price $13.23TELOLY Submersible Aquarium Heater 100W Fish Tank Heater Adjustable Temperature for 5 to 100 Gallon Tank, 1Pcs
Shipping, arrives in 3+ daysHIBIBUD 100W Adjustable Aquarium Heater Submersible Glass Water Heater for 5-70 Gallon Fish Tank $13.89
$1389current price $13.89HIBIBUD 100W Adjustable Aquarium Heater Submersible Glass Water Heater for 5-70 Gallon Fish Tank
Shipping, arrives in 3+ daysReduced price 10W Mini Aquarium Fish Tank Heater USB Heating Rod Submersi/ Heater S0H1 $6.22 Was $7.50
Reduced price
Now$622current price Now $6.22, Was $7.50$7.50+$2.97 shipping10W Mini Aquarium Fish Tank Heater USB Heating Rod Submersi/ Heater S0H1
Shipping, arrives in 3+ daysmarineland Precision aquarium Heater, up to 12 gallons, 50-Watts $39.40
$3940current price $39.40marineland Precision aquarium Heater, up to 12 gallons, 50-Watts
592.2 out of 5 Stars. 59 reviewsSave withShipping, arrives in 2 days
Popular items in this category
Best selling items that customers love
Aqueon Submersible Aquatic Flat Heater, Up to 10 Gallons, Black, 15 Watts $17.95
$1795current price $17.95Aqueon Submersible Aquatic Flat Heater, Up to 10 Gallons, Black, 15 Watts
54.2 out of 5 Stars. 5 reviewsSave withShipping, arrives in 2 daysAqueon Preset Aquarium Heater Black, 100 Watts, Up to 30 Gallons $20.82 $1.00/ea
$2082current price $20.82$1.00/eaAqueon Preset Aquarium Heater Black, 100 Watts, Up to 30 Gallons
144 out of 5 Stars. 14 reviewsSave withShipping, arrives tomorrowAqueon Submersible Aquarium Heater, 100 Watts, Up to 40 Gallons $39.95 Was $49.99
3 optionsAvailable in additional 3 optionsNow$3995current price Now $39.95, Was $49.99$49.99Options from $39.95 – $54.95Aqueon Submersible Aquarium Heater, 100 Watts, Up to 40 Gallons
454.3 out of 5 Stars. 45 reviewsSave withShipping, arrives in 2 daysAqueon Submersible Aquarium Heater, 50 Watts, Up to 20 Gallons $37.95 $1.30/ft
$3795current price $37.95$1.30/ftAqueon Submersible Aquarium Heater, 50 Watts, Up to 20 Gallons
24.5 out of 5 Stars. 2 reviewsSave withShipping, arrives tomorrowAqueon Preset Aquarium Heater Black, 150 Watts $20.99
$2099current price $20.99Aqueon Preset Aquarium Heater Black, 150 Watts
54.8 out of 5 Stars. 5 reviewsSave withShipping, arrives tomorrowAqueon Adjustable PRO Aquarium Heater Up to 100 Gallons, 300 Watts $69.95
$6995current price $69.95Aqueon Adjustable PRO Aquarium Heater Up to 100 Gallons, 300 Watts
194.7 out of 5 Stars. 19 reviewsSave withShipping, arrives tomorrowAqueon Adjustable PRO Aquarium Heater Up to 30 Gallons, 100 Watts $62.95
$6295current price $62.95Aqueon Adjustable PRO Aquarium Heater Up to 30 Gallons, 100 Watts
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysAqueon Preset Aquarium Heater Black, 200 Watts $27.74
$2774current price $27.74Aqueon Preset Aquarium Heater Black, 200 Watts
73.9 out of 5 Stars. 7 reviewsShipping, arrives in 3+ daysAqueon Adjustable PRO Aquarium Heater Up to 20 Gallons, 50 Watts $45.95
$4595current price $45.95Aqueon Adjustable PRO Aquarium Heater Up to 20 Gallons, 50 Watts
Shipping, arrives in 3+ daysAqueon Adjustable PRO Aquarium Heater Up to 75 Gallons, 200 Watts $57.99
$5799current price $57.99Aqueon Adjustable PRO Aquarium Heater Up to 75 Gallons, 200 Watts
24 out of 5 Stars. 2 reviewsShipping, arrives in 3+ daysFluval P50 Submersible Aquarium Heater for Up to 15 Gallons, 50 Watts $29.99
$2999current price $29.99Fluval P50 Submersible Aquarium Heater for Up to 15 Gallons, 50 Watts
Shipping, arrives in 3+ daysFluval P10 Submersible Aquarium Heater for Up to 3 Gallons, 10 Watts $24.99
$2499current price $24.99Fluval P10 Submersible Aquarium Heater for Up to 3 Gallons, 10 Watts
Shipping, arrives in 3+ daysAquael Ultra Aquarium Heater for Freshwater & Saltwater Aquariums - 75 Watt, 9-20 Gallon $39.99
$3999current price $39.99Aquael Ultra Aquarium Heater for Freshwater & Saltwater Aquariums - 75 Watt, 9-20 Gallon
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysFluval T50 Fully Electronic Aquarium Heater 50 watt $52.99
$5299current price $52.99Fluval T50 Fully Electronic Aquarium Heater 50 watt
15 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysAquael Ultra Aquarium Heater for Freshwater & Saltwater Aquariums - 50 Watt, 4-13 Gallon $34.99
$3499current price $34.99Aquael Ultra Aquarium Heater for Freshwater & Saltwater Aquariums - 50 Watt, 4-13 Gallon
Shipping, arrives in 3+ daysHygger - Submersible Aquarium Heater - 15W $22.99
5 optionsAvailable in additional 5 options$2299current price $22.99Options from $22.99 – $32.95Hygger - Submersible Aquarium Heater - 15W
14 out of 5 Stars. 1 reviewsShipping, arrives in 3+ daysAquarium Heater 500W Upgraded Fish Tank Heater, Suitable For Saltwater and Freshwater 20 Gallons to 60 Gallons $17.99
$1799current price $17.99+$4.49 shippingAquarium Heater 500W Upgraded Fish Tank Heater, Suitable For Saltwater and Freshwater 20 Gallons to 60 Gallons
33.3 out of 5 Stars. 3 reviewsShipping, arrives in 3+ days50W/100W/300W Adjustable Aquarium Heater, Submersible Glass Water Heater for 5 70 Gallon Fish Tank $10.90
4 optionsAvailable in additional 4 options$1090current price $10.90+$3.99 shippingMore options from $10.2050W/100W/300W Adjustable Aquarium Heater, Submersible Glass Water Heater for 5 70 Gallon Fish Tank
33.3 out of 5 Stars. 3 reviewsShipping, arrives in 3+ daysAquarium Heater 50 W, Submersible Fish Tank Heater Thermostat with Suction Cup for 5 to 15 Gal Tank $13.59
$1359current price $13.59Aquarium Heater 50 W, Submersible Fish Tank Heater Thermostat with Suction Cup for 5 to 15 Gal Tank
224.6 out of 5 Stars. 22 reviewsSave withShipping, arrives tomorrow
Frequently bought together
Frequently bought together, Aqueon Submersible Aquatic Flat Heater Mini Up to 2.5 Gallons, Black, 5 Watts
Aqueon Submersible Aquatic Flat Heater Mini Up to 2.5 Gallons, Black, 5 Watts $17.14

$1714
current price $17.14Aqueon Submersible Aquatic Flat Heater Mini Up to 2.5 Gallons, Black, 5 Watts
1404.2 out of 5 Stars. 140 reviews
Frequently bought together, Aqueon Betta Bowl Plus Water Conditioner 4 Ounces
Aqueon Betta Bowl Plus Water Conditioner 4 Ounces $11.99 $3.00/fl oz

$1199
current price $11.99$3.00/fl oz
Aqueon Betta Bowl Plus Water Conditioner 4 Ounces
344.6 out of 5 Stars. 34 reviews
Current price is $29.13
Items may be delivered on different dates
Customer ratings & reviews
How item rating is calculated
Reviews summary
Pros
- : Suitable for small tank sizes, including 1-3 gallons.
Neutral
- : Can maintain optimal temperature, but may heat slowly or inconsistently.
Generated by AI
Customer images






+1 image
Sort by |
Showing 1-3 of 65 reviews
Nov 18, 2025
Mariana
Item details
Size: 5 watt
5 out of 5 stars review
Verified Purchase
Perfect
Literally the only product I will get for my 2.5 gallon betta tank
Helpful?25JB7WF637FU916961950
Jul 5, 2025
Blanca
Item details
Size: 5 watt
5 out of 5 stars review
Verified Purchase
I love 💕 that I was able to find a small filter for my Betta to make his water 💦 comfy
Helpful?25JB7WF637FU916961950
May 5, 2020
TAMB23
5 out of 5 stars review
Verified Purchase
This has been in our beta tank for about a week now. It keeps the water consistent between 78-80 degrees. It small which is great for our 2 gallon tank.
Helpful?25JB7WF637FU916961950
More items to consider
Based on what customers bought
Marina Floating Thermometer with Suction Cup $7.29
2 optionsAvailable in additional 2 options$729current price $7.29Marina Floating Thermometer with Suction Cup
304.4 out of 5 Stars. 30 reviewsShipping, arrives in 3+ daysTetra Whisper Ready-to-Use Disposable Filter Cartridges for Aquariums X-Small, 4 Count $5.99 $1.50/count
$599current price $5.99$1.50/countTetra Whisper Ready-to-Use Disposable Filter Cartridges for Aquariums X-Small, 4 Count
3294.6 out of 5 Stars. 329 reviewsSave withShipping, arrives tomorrowMarina Stainless Steel Thermometer $8.49
2 optionsAvailable in additional 2 options$849current price $8.49Marina Stainless Steel Thermometer
63 out of 5 Stars. 6 reviewsShipping, arrives in 3+ daysBest seller Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons $12.87
Best seller
3 optionsAvailable in additional 3 options$1287current price $12.87Options from $12.87 – $37.62Tetra Whisper Internal Power Filter for Aquariums 1 to 4 Gallons
10154.1 out of 5 Stars. 1015 reviewsSave withShipping, arrives tomorrowAqueon Aquarium Algae Cleaning Magnets Glass/Acrylic Small $14.06
4 optionsAvailable in additional 4 options$1406current price $14.06Options from $14.06 – $20.93Aqueon Aquarium Algae Cleaning Magnets Glass/Acrylic Small
394.4 out of 5 Stars. 39 reviewsSave withShipping, arrives tomorrowMarina Betta EZ Care Aquarium Kit - White - 0.07 Gallon $22.99
3 optionsAvailable in additional 3 options$2299current price $22.99Marina Betta EZ Care Aquarium Kit - White - 0.07 Gallon
1272.8 out of 5 Stars. 127 reviewsSave withShipping, arrives tomorrowHikari HIK71100 0.08 oz Betta Revive Broad Spectrum Aid Fish $8.01
2 optionsAvailable in additional 2 options$801current price $8.01Options from $8.01 – $8.95Hikari HIK71100 0.08 oz Betta Revive Broad Spectrum Aid Fish
223.8 out of 5 Stars. 22 reviewsShipping, arrives in 3+ daysAqueon Replacement Filter Cartridges Small - 6 pack $16.95
3 optionsAvailable in additional 3 options$1695current price $16.95Options from $16.95 – $20.95Aqueon Replacement Filter Cartridges Small - 6 pack
1994.7 out of 5 Stars. 199 reviewsSave withShipping, arrives tomorrowAqueon Siphon Vacuum Gravel Cleaner Medium - 9 Inches $15.71
3 optionsAvailable in additional 3 options$1571current price $15.71More options from $11.97Aqueon Siphon Vacuum Gravel Cleaner Medium - 9 Inches
343.6 out of 5 Stars. 34 reviewsSave withShipping, arrives tomorrowPenn Plax Plastic 16-inch Aquarium Plants, 3-Count Pack, Green, Small 16" $15.89
2 optionsAvailable in additional 2 options$1589current price $15.89Penn Plax Plastic 16-inch Aquarium Plants, 3-Count Pack, Green, Small 16"
224.8 out of 5 Stars. 22 reviewsSave withShipping, arrives tomorrowSmall Aquarium Light Clip on Fish Tank Light LED Aquarium Lights RGB Fish Tank Lights Waterproof Blue+Pink+Green for 1-5 Gal Betta Tank Small Fish Aquarium Tank Lighting $6.00
$600current price $6.00+$1.99 shippingSmall Aquarium Light Clip on Fish Tank Light LED Aquarium Lights RGB Fish Tank Lights Waterproof Blue+Pink+Green for 1-5 Gal Betta Tank Small Fish Aquarium Tank Lighting
Shipping, arrives in 3+ daysWalbest Mini Filter, Super Mini Aquarium Single Sponge Filter, 3-in-1 Filtration Ultra Quiet Air Pump, Quiet Submersible Foam Filter for Small Fish Tank 1-10 Gallon $4.30
$430current price $4.30+$1.97 shippingWalbest Mini Filter, Super Mini Aquarium Single Sponge Filter, 3-in-1 Filtration Ultra Quiet Air Pump, Quiet Submersible Foam Filter for Small Fish Tank 1-10 Gallon
64.3 out of 5 Stars. 6 reviewsShipping, arrives in 3+ daysBest seller Tetra BettaSafe Aquarium Water Conditioner for Bettas, 1.69 oz $5.52 Was $6.52
Best seller
4 optionsAvailable in additional 4 optionsNow$552current price Now $5.52, Was $6.52$6.52Options from $5.52 – $15.08Tetra BettaSafe Aquarium Water Conditioner for Bettas, 1.69 oz
2154.6 out of 5 Stars. 215 reviewsSave withPickup todayDelivery todayShipping, arrives todayBest seller Zoo Med Betta Leaf Hammock Fish Bed, Large $6.69
Best seller
$669current price $6.69Zoo Med Betta Leaf Hammock Fish Bed, Large
144.6 out of 5 Stars. 14 reviewsShipping, arrives in 3+ daysPenn-Plax Cascade Nano Aquarium Filter & Air Pump Kit for Bettas – Filtration Perfect For Small Fish $9.97 Was $15.00
2 optionsAvailable in additional 2 optionsNow$997current price Now $9.97, Was $15.00$15.00Penn-Plax Cascade Nano Aquarium Filter & Air Pump Kit for Bettas – Filtration Perfect For Small Fish
4524 out of 5 Stars. 452 reviewsSave withShipping, arrives todayBest seller Penn-Plax SpongeBob Pineapple Home Aquarium Decor, Yellow & Orange Resin - 3" x 3.25" x 5.25" $8.56
Best seller
$856current price $8.56Penn-Plax SpongeBob Pineapple Home Aquarium Decor, Yellow & Orange Resin - 3" x 3.25" x 5.25"
2034.3 out of 5 Stars. 203 reviewsSave withPickup todayDelivery todayShipping, arrives today




