

Tetra Submersible Aquarium Heater, 50-Watts
Key item features
This Tetra submersible 50-watt heater is very easy to use for aquariums ranging from 2 to 30-gallons. The electronic thermostat automatically adjusts heat output to keep the water at a constant 78 degrees Fahrenheit. All you have to do is put it in the aquarium and plug it in.
Features
- No adjustment required
- Easy to conceal
- Two year warranty
- Please read all label information on delivery
Specs
- Watts50
- FeaturesSubmersible
- Height6.5 in
- AccessoriesSuction cup
Reviews summary
- : Offers good value at this cost.
- : Designed for smaller aquariums with limited space.
- : Ideal for compact spaces, maintaining steady temperature.
- : Can maintain optimal temperatures, but may fluctuate.
- : Fails to maintain or reach set temperature consistently.
- : Indicator light operation is inconsistent, sometimes not turning on or staying on briefly.
Free 90-day returns
How do you want your item?
More seller options (1)
Similar items you might like
Based on what customers bought
Best 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 todayMarina 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+ daysDaToo 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 in 2 daysTetra HT Submersible Heater 150 Watts, For Aquariums 30 To 40 Gallons, UL Listed $23.97
$2397current price $23.97Tetra HT Submersible Heater 150 Watts, For Aquariums 30 To 40 Gallons, UL Listed
193.8 out of 5 Stars. 19 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 todayClearance SDJMa 25/50/100/200/300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cups $14.09
$1409current price $14.09More options from $12.99SDJMa 25/50/100/200/300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cups
173.9 out of 5 Stars. 17 reviewsShipping, arrives in 3+ daysAqueon 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 tomorrowBest seller Vibrant Life 100 W Aquarium Heater $20.13
Best seller
$2013current price $20.13Vibrant Life 100 W Aquarium Heater
734.5 out of 5 Stars. 73 reviewsSave withPickup todayDelivery todayShipping, arrives todayPenn-Plax Cascade Glass Heater – 8.5” Length – 100 Watt - for Aquarium and Fish Tanks $18.92 Was $24.49
Now$1892current price Now $18.92, Was $24.49$24.49Penn-Plax Cascade Glass Heater – 8.5” Length – 100 Watt - for Aquarium and Fish Tanks
294.4 out of 5 Stars. 29 reviewsSave withShipping, arrives in 2 daysViaaqua 200-Watt Quartz Glass Submersible Heater With Built-In Thermostat $18.99
$1899current price $18.99Viaaqua 200-Watt Quartz Glass Submersible Heater With Built-In Thermostat
25 out of 5 Stars. 2 reviewsSave withShipping, arrives tomorrowBest seller Vibrant Life 25 Watts Aquarium Heater $12.97
Best seller
$1297current price $12.97Vibrant Life 25 Watts Aquarium Heater
1134.7 out of 5 Stars. 113 reviewsSave withPickup todayDelivery todayShipping, arrives todayAquaneat Aquarium Heater, 50W Fish Tank Heater, Adjustable Submersible Water Thermostat with Thermometer $10.99
5 optionsAvailable in additional 5 options$1099current price $10.99Options from $10.99 – $14.99Aquaneat Aquarium Heater, 50W Fish Tank Heater, Adjustable Submersible Water Thermostat with Thermometer
104.4 out of 5 Stars. 10 reviewsShipping, arrives in 3+ daysVNEKVA 100W Mini Submersible Aquarium Heater with External Controller and Overheat Protection for 5–15 Gallon Fish and Turtle Tanks $13.99 Was $16.99
Now$1399current price Now $13.99, Was $16.99$16.99VNEKVA 100W Mini Submersible Aquarium Heater with External Controller and Overheat Protection for 5–15 Gallon Fish and Turtle Tanks
44 out of 5 Stars. 4 reviewsSave withShipping, arrives in 2 daysSuper Mini Aquarium Heater, 50W Small Fish Tank Heater Turtle Tank Mini Thermostatic Rod Heater for 5-10 Gal Tank Intelligent Constant , Dry-Run/Overheating Protection & 26 Degrees Heating Rod $6.27
$627current price $6.27+$4.49 shippingSuper Mini Aquarium Heater, 50W Small Fish Tank Heater Turtle Tank Mini Thermostatic Rod Heater for 5-10 Gal Tank Intelligent Constant , Dry-Run/Overheating Protection & 26 Degrees Heating Rod
Shipping, arrives in 3+ daysAquatop Aquatic Supplies-Nano Aquarium Heater 15 Watt $12.99
$1299current price $12.99Aquatop Aquatic Supplies-Nano Aquarium Heater 15 Watt
Save withShipping, arrives tomorrowCNZ Aquarium Quartz Glass Submersible Heaters, 200-watt $14.99
$1499current price $14.99CNZ Aquarium Quartz Glass Submersible Heaters, 200-watt
34.7 out of 5 Stars. 3 reviewsSave withShipping, arrives tomorrow
About this item
Product details
This Tetra submersible 50-watt heater is very easy to use for aquariums ranging from 2 to 30-gallons. The electronic thermostat automatically adjusts heat output to keep the water at a constant 78 degrees Fahrenheit. All you have to do is put it in the aquarium and plug it in.
Features
- No adjustment required
- Easy to conceal
- Two year warranty
- Please read all label information on delivery
Specifications
Watts
Features
Height
Accessories
Directions
Instructions
Fabric Care Instructions
Warranty
Warranty information
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.
Popular items in this category
Best selling items that customers love
Tetra 19514 ReptoGuard Water Conditioner Block $5.99 $54.46/lb
$599current price $5.99$54.46/lbTetra 19514 ReptoGuard Water Conditioner Block
514.4 out of 5 Stars. 51 reviewsSave withShipping, arrives tomorrowTetra AquaSafe Plus Aquarium Water Conditioner and De-Chlorinator,16.9 oz $17.27 $1.24/ea
$1727current price $17.27$1.24/eaTetra AquaSafe Plus Aquarium Water Conditioner and De-Chlorinator,16.9 oz
1754.6 out of 5 Stars. 175 reviewsSave withShipping, arrives tomorrowAqueon 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 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 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 todayAqueon 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 tomorrowTetra Whisper Air Pump for Aquariums 10 to 20 Gallons, Powerful Airflow, Non-UL Listed $21.67
$2167current price $21.67Tetra Whisper Air Pump for Aquariums 10 to 20 Gallons, Powerful Airflow, Non-UL Listed
132.9 out of 5 Stars. 13 reviewsSave withShipping, arrives in 2 daysAqueon 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 tomorrowFluval 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+ daysTetra Whisper IQ Power Filter 10 Gallons, 105 GPH, with Stay Clean Technology $19.97 $19.97/count
$1997current price $19.97$19.97/countTetra Whisper IQ Power Filter 10 Gallons, 105 GPH, with Stay Clean Technology
433 out of 5 Stars. 43 reviewsSave withShipping, arrives tomorrowTetra Whisper IQ Power Filter 30 Gallons, 175 GPH, With Stay Clean Technology $31.97 $31.97/count
$3197current price $31.97$31.97/countTetra Whisper IQ Power Filter 30 Gallons, 175 GPH, With Stay Clean Technology
573.4 out of 5 Stars. 57 reviewsSave withShipping, arrives tomorrowTetra EasyStrips 6-in-1 Aquarium Test Strips, Water Testing $13.83 34.8 ¢/ea
$1383current price $13.8334.8 ¢/eaTetra EasyStrips 6-in-1 Aquarium Test Strips, Water Testing
354.7 out of 5 Stars. 35 reviewsSave withShipping, arrives tomorrowGloFish 6-Inch LED Light Stick for Fish Aquariums Up to 5 Gallons, White and Blue LED Lights $25.97
$2597current price $25.97GloFish 6-Inch LED Light Stick for Fish Aquariums Up to 5 Gallons, White and Blue LED Lights
193.5 out of 5 Stars. 19 reviewsSave withPickup todayDelivery todayShipping, arrives todayAqueon 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+ 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+ daysTetra Whisper PF10 Power Filter for 5 to 10 Gallon Aquariums, Quiet 3-Stage Aquarium Filtration $19.47
$1947current price $19.47Tetra Whisper PF10 Power Filter for 5 to 10 Gallon Aquariums, Quiet 3-Stage Aquarium Filtration
1163.9 out of 5 Stars. 116 reviewsSave withShipping, arrives tomorrowHygger - 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+ 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 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 tomorrowBest seller Tetra Whisper Advanced Power Filter 30-60 Gallons, for Freshwater & Saltwater Aquariums $49.00 $49.00/count
Best seller
$4900current price $49.00$49.00/countTetra Whisper Advanced Power Filter 30-60 Gallons, for Freshwater & Saltwater Aquariums
2873.9 out of 5 Stars. 287 reviewsSave withShipping, arrives tomorrow
More items to consider
Based on what customers bought
Tetra Whisper Air Pump 10 to 30 Gallons, for Aquariums, Quiet, Powerful Airflow $21.57
5 optionsAvailable in additional 5 options$2157current price $21.57More options from $17.37Tetra Whisper Air Pump 10 to 30 Gallons, for Aquariums, Quiet, Powerful Airflow
1464.1 out of 5 Stars. 146 reviewsSave withShipping, arrives tomorrow50+ bought since yesterday Tetra Waterclarifier Aquarium Water Treatment, Clears Cloudy Aquarium Water, 3.38 oz. $5.32
50+ bought since yesterday
4 optionsAvailable in additional 4 optionsSponsored$532current price $5.32Options from $5.32 – $21.28Tetra Waterclarifier Aquarium Water Treatment, Clears Cloudy Aquarium Water, 3.38 oz.
4714.6 out of 5 Stars. 471 reviewsSave withPickup todayDelivery todayShipping, arrives todayAQUANEAT 6 PCS Aquarium Thermometer Strips, Reptile Thermometer, Fish Tank Thermometer Sticker, Terrarium Water Temperature Test $7.99
3 optionsAvailable in additional 3 optionsSponsored$799current price $7.99AQUANEAT 6 PCS Aquarium Thermometer Strips, Reptile Thermometer, Fish Tank Thermometer Sticker, Terrarium Water Temperature Test
93.3 out of 5 Stars. 9 reviewsShipping, arrives in 3+ daysInterpet 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 tomorrowAqua Culture 5-15 Gallon Single Outlet Aquarium Air Pump $10.12 Was $21.00
2 optionsAvailable in additional 2 optionsNow$1012current price Now $10.12, Was $21.00$21.00Options from $10.12 – $80.96Aqua Culture 5-15 Gallon Single Outlet Aquarium Air Pump
3614.3 out of 5 Stars. 361 reviewsSave withPickup todayDelivery todayShipping, arrives todayBest 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
10174.1 out of 5 Stars. 1017 reviewsSave withShipping, arrives tomorrowBest seller Stoney River White Aquatic Sand 5-Pound Bag $7.98
Best seller
5 optionsAvailable in additional 5 options$798current price $7.98Options from $7.98 – $31.92Stoney River White Aquatic Sand 5-Pound Bag
2284.4 out of 5 Stars. 228 reviewsSave withPickup todayDelivery todayShipping, arrives todayBest seller Tetra SafeStart, Cycles Water in Newly Set up Aquariums, 3.38 oz. $8.42
Best seller
4 optionsAvailable in additional 4 options$842current price $8.42Options from $8.42 – $33.68Tetra SafeStart, Cycles Water in Newly Set up Aquariums, 3.38 oz.
1034.3 out of 5 Stars. 103 reviewsSave withPickup todayDelivery todayShipping, arrives todayBest seller Tetra Algae Control Aquarium Water Treatment, Controls Algae in Aquariums, 1.69 oz. $4.48
Best seller
4 optionsAvailable in additional 4 options$448current price $4.48Options from $4.48 – $17.92Tetra Algae Control Aquarium Water Treatment, Controls Algae in Aquariums, 1.69 oz.
3254 out of 5 Stars. 325 reviewsSave withPickup todayDelivery todayShipping, arrives todayMarina 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+ daysPenn 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 tomorrowBest seller Tetra 0.25 oz Tetra Bloodworms Freeze-Dried Fish Food $5.07
Best seller
4 optionsAvailable in additional 4 options$507current price $5.07Options from $5.07 – $19.28Tetra 0.25 oz Tetra Bloodworms Freeze-Dried Fish Food
2184.5 out of 5 Stars. 218 reviewsSave withPickup todayDelivery todayShipping, arrives todayAqueon 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 tomorrowTetra Whisper Bio-Bag Unassembled Disposable Filter Cartridge for Aquariums, Medium, 12 Count $18.88
2 optionsAvailable in additional 2 options$1888current price $18.88Tetra Whisper Bio-Bag Unassembled Disposable Filter Cartridge for Aquariums, Medium, 12 Count
784.7 out of 5 Stars. 78 reviewsSave withShipping, arrives tomorrow(2 pack) Aqua Culture Aquarium Gravel, Black, 5 lb $13.56
4 optionsAvailable in additional 4 options$1356current price $13.56Options from $13.56 – $20.34(2 pack) Aqua Culture Aquarium Gravel, Black, 5 lb
2024.3 out of 5 Stars. 202 reviewsSave withShipping, arrives tomorrowTetra Whisper Air Pump for Aquariums up to 10 Gallons, Powerful Airflow, Non-UL Listed, 5.5 in. $17.47
2 optionsAvailable in additional 2 options$1747current price $17.47Tetra Whisper Air Pump for Aquariums up to 10 Gallons, Powerful Airflow, Non-UL Listed, 5.5 in.
2394.6 out of 5 Stars. 239 reviewsSave withShipping, arrives tomorrow(2 pack) Aqua Culture Aquarium Gravel Mix, Neon Starry Night, 5-Pound $13.56
2 optionsAvailable in additional 2 options$1356current price $13.56(2 pack) Aqua Culture Aquarium Gravel Mix, Neon Starry Night, 5-Pound
4104.7 out of 5 Stars. 410 reviewsSave withShipping, arrives in 2 daysTetra Whisper Bio-Bag Unassembled,Disposable Filter Cartridges for Aquariums, Large, 12 Count $14.57
3 optionsAvailable in additional 3 options$1457current price $14.57More options from $12.98Tetra Whisper Bio-Bag Unassembled,Disposable Filter Cartridges for Aquariums, Large, 12 Count
2724.7 out of 5 Stars. 272 reviewsSave withShipping, arrives in 2 days
Customer ratings & reviews
Reviews summary
- : Offers good value at this cost.
- : Designed for smaller aquariums with limited space.
- : Ideal for compact spaces, maintaining steady temperature.
- : Can maintain optimal temperatures, but may fluctuate.
- : Fails to maintain or reach set temperature consistently.
- : Indicator light operation is inconsistent, sometimes not turning on or staying on briefly.
Customer images






+15 images
Showing 1-3 of 402 reviews
Verified Purchase
The perfect heater.
The fish tank heater is easy to install and it heats the tank to the temperature needed. The price was very affordable.. My turtles are enjoying the heat.
Verified Purchase
Great heater for small tank.
I bought this heater for my daughters new betta fish 2 gallon tank. I love the fact that it suctioned on the side of the tank & also has an auto shut off when it reaches correct temp. He dif. seems to like it being warm.
Verified Purchase
works great in my 5 gallon tank
Frequently bought together
Tetra Submersible Aquarium Heater, 50-Watts $15.27

Tetra Submersible Aquarium Heater, 50-Watts
Best seller Tetra EasyBalance pH and Alkalinity Regulator Aquarium Water Conditioner, 3.38 oz $6.27 $1.86/fl oz

Tetra EasyBalance pH and Alkalinity Regulator Aquarium Water Conditioner, 3.38 oz
biOrb FLOW 15 Aquarium with MCR Light - 4 Gallon, White, Acrylic $200.53






