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PULACO 25W Small Aquarium Submersible Betta Heater

Curated from 79 real Reddit conversations

Refreshed on: April 7, 2025

PULACO 25W Small Aquarium Submersible Betta Heater

Brand: PULACO

Price: $9

Snoop Score:

4.3

Sentiment

6.9

Popularity

3.7

Technical

3.6

Buy on Amazon for $9 See All Aquarium Heaters Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The PULACO 25W Small Aquarium Submersible Betta Heater is designed for fish enthusiasts who need a reliable heating solution for their small aquariums. With a preset temperature of 78℉, this heater is ideal for 1 to 6-gallon tanks and ensures a stable environment for your bettas and other fish. Consumer feedback has highlighted the heater's ease of use and effective heat retention, with users noting that "the heaters retain their heat really well too." However, concerns have been raised about its reliability, as some users have experienced malfunctions and safety issues, leading to warnings like "a 23-day-old tank heater almost burnt down my house tonight." Overall, while many appreciate its simplicity, reliability remains a concern for some. Based on the feedback, the PULACO heater may be suitable for those looking for an affordable and easy-to-use option, but potential buyers should weigh the reported reliability issues against their needs. If safety and long-term performance are top priorities, exploring other brands might be advisable.

Not for you? Check out our other rated Aquarium Heaters

What does this mean? Heater flashes red occasionally Hi everyone, Just currently got a 5gal tank to
Positive Feedback

not sure but i would unplug if i were you.
Negative Feedback

4.3

PULACO 25W Small Aquarium Submersible Betta Heater

Buy on Amazon for $9

Freshwater Aquariums

3 / 10

Saltwater Aquariums

3 / 10

Marine Life Habitats

2 / 10

Small to Medium Tanks

3 / 10

See how this compares to all Aquarium Heaters

What it does well!

Key strengths users can’t stop talking about.

Heater is easy to use with preset temperature

“What does this mean? Heater flashes red occasionally Hi everyone, Just currently got a 5gal tank to”➕

“I might just be an idiot lmao”➕

“It just means it’s heating the water to the preset temperature again, don’t worry about it mine does”➕

“Don't stress it, it just means it's warming up the water :D”➕

Easy to use with preset temperature

“Should I be concerned?”➕

Heater retains heat well

“The heaters retain their heat really well too.”➕

Easy to position horizontally for water changes

“I purposefully have my heaters horizontal in the bottom 1/3rd of my tank, so I can do a 50% water change w/out unplugging.”➕

Separate power strip for heaters is effective

“It's been working well for me!”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Heaters may have reliability issues

“not sure but i would unplug if i were you.”➕

“If they came out it means it's not water tight and the coil is touching water.”➕

“It's cute and all, but, I'd replace it.”➕

“What is the best aquarium test kit? I'm looking to buy an aquarium test kit and initially considered”➕

Heater may malfunction or require replacement

“I’ve never had any fish get boiled, but I’ve heard enough horror stories to recognize a red flag that says “buy a new heater asap”.”➕

“Definitely not normal. Please remove it and buy another.”➕

Other brands reported more reliability

“I switched to Eheim-Jager, a little more pricy but way more reliable.”➕

Heater can crackle or malfunction if unplugged too soon

“Had it happen to me - except glass and it started to crackle but not break 100%, still junk though lol.”➕

Heater may pose safety hazards

“A 23 day old tank heater almost burnt down my house tonight.”➕

“I woke up at 4:15 this morning to an absolutely wretched smell.”➕

Users prefer known brands for reliability

“Exactly the reason I only buy aquarium electronics from known quality brands.”➕

Compare On All Talked About Dimensions

Product Name	Price	Score	See Details	Buy Now
AQQA Aquarium Heater 500W for 66-135 Gallon Fish Tanks	$25	7.3	Details	Buy
Fluval E 300 Watt Electronic Heater	$34	7.2	Details	Buy
HITOP 50W Adjustable Aquarium Heater	$11	7.1	Details	Buy
HiTauing Aquarium Heater - Submersible Fish Tank Heater	$37	6.8	Details	Buy
hygger Aquarium Heater with Digital LED Controller	$43	6.5	Details	Buy
Aqueon Submersible Aquatic Flat Heater 15 Watts	$7	6.5	Details	Buy
Dreyoo 2 Set Aquarium Fish Tank Heater	$23	6.0	Details	Buy
HITOP-Fish Hitop 100W Adjustable Aquarium Heater	$14	5.8	Details	Buy
HiTauing Aquarium Heater - 100W Fish Tank Heater	$24	5.8	Details	Buy
DaToo Aquarium Heater Adjustable 50W	$6	5.7	Details	Buy
Tetra 26446 HT Submersible Aquarium Heater	$7	5.4	Details	Buy
Aqueon Pro 300 Submersible Aquarium Heater	$48	5.4	Details	Buy
MarineLand Precision Heater for Aquariums	$13	5.0	Details	Buy
HITOP Compact Submersible Aquarium Heater - 200W	$19	4.9	Details	Buy
Fluval M 200-Watt Submersible Aquarium Heater	$36	4.8	Details	Buy
PULACO 25W Small Aquarium Submersible Betta Heater	$9	4.3	Details	Buy
Aqueon Aquarium Fish Tank Preset Heater	$18	4.1	Details	Buy
hygger Small Submersible Aquarium Heater 100W	$22	3.6	Details	Buy
Orlushy Submersible Aquarium Heater, 150W	$19	3.4	Details	Buy
FREESEA Aquarium Heater for Fish Tank	$27	3.0	Details	Buy
FREESEA Aquarium Fish Tank Heater 50W	$16	2.6	Details	Buy

Core Power Plays

The specs and strengths that make it shine.

Heater operation based on water temperature is standard

“They are supposed to turn on and off as needed based on tank temp.”➕

“Most if not all heaters run on either a timer or turn off automatically once the water reaches a certain temperature.”➕

“The water wasn't circulating enough in the area so it turned off constantly.”➕

Temperature controllers can enhance heater safety

“Combined with one of those, you just have to make sure the heater stays submerged in an area with a current so the hot water is distributed through the tank.”➕

Heaters need to be submerged to avoid breaking.

“They will break if there is no more water in the reservoir.”➕

Insulation affects heating efficiency.

“So quick hot water 101.”➕

Users share personal experiences with heater management

“Wow I have been unplugging all of them this whole time 😂”➕

“Oh its a good thing to know, unfortunately we never replaced it and now its required in that 10g again lol”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.

Using a camping stove or kettle may be simpler than using an aquarium heater.

“I could just as easily do this with my camping stove or a kettle of which I already own and I do that.”➕

Alternative options for filters and pumps discussed

“For that price I would just upgrade to a 5 gallon.”➕

“it's very quiet and efficient.”➕

In-line heaters are an alternative solution

“Just get an in-line heater, they’re just a few bucks more than the hang on ones and never leave the water.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’

Pre-set thermostats are commonly used with small heaters

“I use them often with small heaters with pre set in thermostats.”➕

Best practice includes using a thermostat with heaters

“If you are brand new to fish, while I recognize that smaller tanks are cute and beautiful, I would highly recommend starting with 20 gallon long tank.”➕

Heating water with aquarium heaters can take considerable time.

“The electric heater works but isn’t ideal.”➕

“it would take approximately **9 to 10 minutes** for a 300-watt aquarium heater to heat 2 gallons of water from 70°F to 80°F under ideal conditions.”➕

Upgrading to a larger tank may be more cost-effective than replacing filters

“Seems like it would cost less to get a 5 or 10 gallon tank than it would to get a new filter.”➕

College students face challenges transporting small tanks

“I’m a college student and sometimes I transport the fish back and forth from college to my parents house and that is already difficult with a 3 gal.”➕

Reminder to unplug heater during water changes is valuable

“Never forget to unplug your heater when do a water change.”➕

“Good suggestion. I'll remember that next time I clean the tank.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.

Circulation issues may affect heater performance

“Not sure if I helped or brought any idea's to the field but - my .02$.”➕

Multiple heater failures experienced by users

“At this point I am ready to lose it. My fish are freezing and idk what the fuck to do.”➕

Heater reliability concerns shared across brands

“I just want a reliable heater that won’t short out or end up boiling my fish.”➕

“I recommend, I use them in my other tanks now also.”➕

“Now I’m just hesitating and will end up ordering one anyway.”➕

Installation mistakes lead to heater failures

“90% of the reason people's heaters die is because they didn't install them properly.”➕

Negative experiences with newer heater models

“New versions of Jager and Theo didn't kept temperature below 83F even on lowest settings, when old versions of the same brands worked well.”➕

Perception of heater reliability varies among users

“Very few heaters fail. There is no need to worry.”➕

Aquarium heaters are efficient but have limitations on temperature.

“Aquarium water heaters are going to top out around 80 degrees, and are relatively inefficient for the power draw.”➕

Variables like starting water temperature and duration affect heater performance.

“Definitely a few variables to consider with power draw.”➕

Concerns about counterfeit products

“THAT'S SUS MAN.”➕