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hygger Small Submersible Aquarium Heater 100W

Curated from 90 real Reddit conversations

Refreshed on: March 7, 2025

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hygger Small Submersible Aquarium Heater 100W

Brand: hygger
Price: $22
Snoop Score:
3.6
Sentiment
6.1
Popularity
5.9
Technical
2.7
Buy on Amazon for $22See All Aquarium Heaters Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The hygger Small Submersible Aquarium Heater 100W is designed for efficient heating in 10-20 gallon saltwater and freshwater tanks. With its built-in thermostat and compact design, it ensures that your aquatic pets thrive in a stable environment while being easy to install and operate. Feedback from users highlights the heater's effective temperature control and real-time display, with one user stating, "You can see the temperature to ensure it isn't overheating." Many have noted the reliability of the heater, mentioning, "I have zero regrets after a couple of years," while others appreciate the compact design that fits well in smaller tanks. However, there are concerns about the automatic shut-off feature, with some users reporting issues, stating, "the chance of heater failure is real, and almost everyone will experience it at some point." Overall, the hygger Small Submersible Aquarium Heater is recommended for its category, particularly for those who prioritize compact design and accurate temperature management, but potential buyers should be mindful of the concerns regarding reliability and safety features.

Not for you? Check out our other rated Aquarium Heaters

I also have Hygger 50 mini submersible for quarantine tank, so far it's working great.

Positive Feedback

I have a growing collection of heaters that SAID they automatically shut off at a certain temp, but then started to cook my poor fish.

Negative Feedback
Product
3.6
hygger Small Submersible Aquarium Heater 100W
Buy on Amazon for $22
Freshwater Aquariums
6 / 10
Saltwater Aquariums
3 / 10
Marine Life Habitats
3 / 10
Small to Medium Tanks
6 / 10
See how this compares to all Aquarium Heaters

What it does well!

Key strengths users can’t stop talking about.
Hygger 50 mini submersible heater is working great
“I also have Hygger 50 mini submersible for quarantine tank, so far it's working great.”➕
Effective temperature control
“WTF IS UP WITH AQUARIUM HEATERS? My heaters keep dieing and its getting expensive.”➕
“HiTauing Aquarium Heater best one on amazon ive used.”➕
Effective temperature display
“You can see the temperature to ensure it isn't overheating.”➕
“If one gets stuck on it still won't be enough to overcook the tank before I can address it.”➕
Compact design suitable for small tanks
“I'm gutted. I have no idea how the two rummynose tetras and kuhli loach survived, but they're not looking too flash right now.”➕
Reliable heating when using multiple units
“Same. I use two small ones. Never had an issue.”➕
“I now have 2 heaters. Neither of which can quite keep it at temp on the warmest day.”➕
Hygger 100W heater works great across multiple tanks
“I have the small hygger 100w on 3 tanks now and it works great.”➕
Hygger offers a good value for most users
“Hygger is a great deal for most people. This one is my favorite so far.”➕
Reliable performance over time
“I have zero regrets after a couple of years.”➕
Effective adjustable temperature control
“Lasting two years is a good selling point for me haha”➕
Good experiences with Hygger equipment
“I’ve had good experiences with Hygger equipment personally so I’m sure their heater is good too.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Automatic shut off feature can be unreliable
“I have a growing collection of heaters that SAID they automatically shut off at a certain temp, but then started to cook my poor fish.”➕
“A display for the temp in this posted scenario would still have ended up in dead fish.”➕
“Glad you’ve had good experiences, but mechanical failures are still a common thing with heaters.”➕
Shopping for heaters is difficult due to high failure rates
“Man shopping for heaters is the biggest pain in the hobby for me, the top reviews of every single one is always "it exploded and killed my fish and burned my house down".”➕
Heater failures can lead to catastrophic tank conditions
“The chance of heater failure is real, and almost everyone will experience it at some point.”➕
Heater can overheat and break if not fully submerged
“Does this heater have to be fully submerged to the water line? I just don’t want it to mess it up.”➕
“Yes it does also it will over heat and break the way your using it also massive fire hazard.”➕
Heater failure led to dead fish
“Ended up being the Hygger heater.”➕
“all it does is beep, and E02, E03 is what pops up before going back to showing the degrees.”➕
Heater shattered and released toxic material
“Do not buy cheap heaters! My heater shattered in my newly cycled tank and released these metal shavings EVERYWHERE.”➕
Heater malfunction can lead to overheating and tank damage
“they are the only two that have malfunctioned and cooked the aquarium.”➕

Compare On All Talked About Dimensions

Product NameImagePriceScoreCompareSee DetailsBuy Now
AQQA Aquarium Heater 500W for 66-135 Gallon Fish TanksAQQA Aquarium Heater 500W for 66-135 Gallon Fish Tanks$25
7.3
DetailsBuy
Fluval E 300 Watt Electronic HeaterFluval E 300 Watt Electronic Heater$34
7.2
DetailsBuy
HITOP 50W Adjustable Aquarium HeaterHITOP 50W Adjustable Aquarium Heater$11
7.1
DetailsBuy
HiTauing Aquarium Heater - Submersible Fish Tank HeaterHiTauing Aquarium Heater - Submersible Fish Tank Heater$37
6.8
DetailsBuy
hygger Aquarium Heater with Digital LED Controllerhygger Aquarium Heater with Digital LED Controller$43
6.5
DetailsBuy
Aqueon Submersible Aquatic Flat Heater 15 WattsAqueon Submersible Aquatic Flat Heater 15 Watts$7
6.5
DetailsBuy
Dreyoo 2 Set Aquarium Fish Tank HeaterDreyoo 2 Set Aquarium Fish Tank Heater$23
6.0
DetailsBuy
HITOP-Fish Hitop 100W Adjustable Aquarium HeaterHITOP-Fish Hitop 100W Adjustable Aquarium Heater$14
5.8
DetailsBuy
HiTauing Aquarium Heater - 100W Fish Tank HeaterHiTauing Aquarium Heater - 100W Fish Tank Heater$24
5.8
DetailsBuy
DaToo Aquarium Heater Adjustable 50WDaToo Aquarium Heater Adjustable 50W$6
5.7
DetailsBuy
Tetra 26446 HT Submersible Aquarium HeaterTetra 26446 HT Submersible Aquarium Heater$7
5.4
DetailsBuy
Aqueon Pro 300 Submersible Aquarium HeaterAqueon Pro 300 Submersible Aquarium Heater$48
5.4
DetailsBuy
MarineLand Precision Heater for AquariumsMarineLand Precision Heater for Aquariums$13
5.0
DetailsBuy
HITOP Compact Submersible Aquarium Heater - 200WHITOP Compact Submersible Aquarium Heater - 200W$19
4.9
DetailsBuy
Fluval M 200-Watt Submersible Aquarium HeaterFluval M 200-Watt Submersible Aquarium Heater$36
4.8
DetailsBuy
PULACO 25W Small Aquarium Submersible Betta HeaterPULACO 25W Small Aquarium Submersible Betta Heater$9
4.3
DetailsBuy
Aqueon Aquarium Fish Tank Preset HeaterAqueon Aquarium Fish Tank Preset Heater$18
4.1
DetailsBuy
hygger Small Submersible Aquarium Heater 100Whygger Small Submersible Aquarium Heater 100W$22
3.6
DetailsBuy
Orlushy Submersible Aquarium Heater, 150WOrlushy Submersible Aquarium Heater, 150W$19
3.4
DetailsBuy
FREESEA Aquarium Heater for Fish TankFREESEA Aquarium Heater for Fish Tank$27
3.0
DetailsBuy
FREESEA Aquarium Fish Tank Heater 50WFREESEA Aquarium Fish Tank Heater 50W$16
2.6
DetailsBuy

Core Power Plays

The specs and strengths that make it shine.
Discussion on the need for quality heaters
“What brand of a heater was it?”➕
“i think i might have the same one and i need to know if i should replace it.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Discussion on using titanium heaters instead
“I never used anything buy the titanium heaters.”➕
Users share various heater recommendations and setups
“I have adjustable heaters, not the cheapest nor the most expensive.”➕
“Inkbird thermostat + any heater= you’re good.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Concerns about needing a manual for used heaters
“I was just asking. And yes.”➕
Discussion about the heater's minimum water line requirement
“It will say minimum water line and water line has to be above that.”➕
Concerns and preferences for adjustable vs preset heaters
“The one I have hardly even heats his 2.5 gallon.”➕
“You want around 5watts per gallon so a 50watt heater should be ok.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Concerns about heater reliability across brands
“These days I have no respect for heaters, and I encourage you to have the same philosophy.”➕
“One thing I strongly strongly recommend is to use two (or ideally three) heaters that are rated at less than the capacity for your tank.”➕
“Heater recs please!!!! I can't find one that seems reliable lol.”➕
“I'll take that for any tiny perceived loss of efficiency.”➕
Experience with heater failures causing tank crashes
“Ive found that you get what you pay for and I replace every few years.”➕
Discussion on the importance of redundancy in heating solutions
“When heaters fail they almost always do so in the “on” position.”➕
Concerns about the reliability of other heater brands
“I'm kind of concerned though because most reddit posts say aqueon heaters aren't very reliable.”➕
User experiences with heater reliability
“I have a 75 gallon freshwater tank and am tired of all my heaters breaking after a few months to a year.”➕
“I have an Eheim Jager that's been running 15 years now.”➕
“I’ve mostly got it down to two- the Eheim Jagger and a Hygge one.”➕
“This one has been really good and doesn’t lose more than 1 degree or go above 1 ever.”➕
Concerns about heater reliability and experiences with failures
“DO NOT BUY, IT WILL KILL YOUR FISH.”➕
“Typically, the only time people have a heater kill their fish if it doesn't self regulate and gets too hot.”➕

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