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Aqueon Pro 300 Submersible Aquarium Heater

Curated from 55 real Reddit conversations

Refreshed on: January 23, 2025

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Aqueon Pro 300 Submersible Aquarium Heater

Brand: Aqueon
Price: $48
Snoop Score:
5.4
Sentiment
4.7
Popularity
5.1
Technical
6.6
Buy on Amazon for $48See All Aquarium Heaters Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Aqueon Pro 300 Submersible Aquarium Fish Tank Heater is designed to maintain optimal water temperatures in aquariums up to 100 gallons. With an adjustable heat setting ranging from 68 to 88°F and an electronic thermostat, it ensures accurate temperature control for both fresh and saltwater environments. Consumer sentiment reflects a mix of experiences with the Aqueon Pro heater, with many users praising its performance and reliability, stating, "I am very happy with the Aqueon Pros." However, some have reported issues, such as functionality problems and insufficient water circulation causing heaters to turn off frequently, which raises concerns about overall reliability. Additionally, the lifetime warranty offers peace of mind to users, although several have noted heater failures over time. Based on the feedback, the Aqueon Pro 300 Heater is generally recommended for its performance and durability, but potential buyers should be cautious of the mixed reviews regarding reliability and functionality issues that some users have experienced.

Not for you? Check out our other rated Aquarium Heaters

It’s terrific.

Positive Feedback

None of my heaters work. Literally none.

Negative Feedback
Product
5.4
Aqueon Pro 300 Submersible Aquarium Heater
Buy on Amazon for $48
Freshwater Aquariums
4 / 10
Saltwater Aquariums
5 / 10
Marine Life Habitats
4 / 10
Small to Medium Tanks
4 / 10
See how this compares to all Aquarium Heaters

What it does well!

Key strengths users can’t stop talking about.
Terrific performance
“It’s terrific.”➕
“I have never had an issue with it.”➕
“all 3 are in saltwater and holding up great.”➕
Accurate temperature readings
“they all do the job.”➕
Lifetime warranty offers peace of mind
“I usually use aqueon pro heaters cuz of the lifetime warranty, but I've gone through like, 6 of them.”➕
Durable tanks that hold water well
“Bought a 65 gallon Aqueon 5 years ago, moved it in the back of a u-haul halfway across the country three times and its still holding water.”➕
Reliable performance with Aqueon heaters
“2 years going strong.”➕
Quality of Aqueon tanks is superior
“The quality isn't as good as aqueon IMO.”➕
Nice range of adjustable heaters
“Aqueon has a nice range of adjustable heaters.”➕
Aqueon Pros heaters work well
“I am very happy with the Aqueon Pros.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Multiple users reported issues with heater functionality
“None of my heaters work. Literally none.”➕
“At this point I am ready to lose it. My fish are freezing and idk what the fuck to do.”➕
Heaters may turn off if water circulation is insufficient
“They are supposed to turn on and off as needed based on tank temp.”➕
“The water wasn't circulating enough in the area so it turned off constantly.”➕
Reported leaks in Aqueon tanks
“Don't buy Aqueon tanks. Woke up to find my 40g Aqueon breeder had drained out onto the apartment floor.”➕
Concerns about heater reliability
“These days I have no respect for heaters, and I encourage you to have the same philosophy.”➕
“I would *always* recommend having a digital thermometer somewhere visible.”➕
Heater functionality issues reported
“This one is probably the worst of the ones I have honestly.”➕
“Ive found that you get what you pay for and I replace every few years.”➕
Heaters are inefficient and poorly calibrated
“Aqueon Pro heaters are more expensive but worth the price.”➕
Frequent failures reported with Aqueon heaters
“IMO, all heaters are destined to fail after a few years, and the best we can do is create a redundant setup where when they fail they cause minimal damage.”➕

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 various heater types
“They need a computer for temp control but they last forever and can’t randomly crack.”➕
Discussion about components of heater kits
“the biggest problem with it is the hood/light combo.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Discussion on tank cycling and setup
“the temperature is still at 67 degrees F.”➕
“Honestly that tank needs a lot of work and you should probably cycle it.”➕
“it’s a rescue situation for a fish currently living in a bowl full of algae.”➕
“you should be good to just drop the heater in there.”➕
Discussion about Topfin vs Aqueon
“Looking online they don’t seem to have great reviews.”➕
Discussion on suitable heater brands
“the top plastic is almost like disintegrating.”➕
“If you go with Eheim, you won’t be sorry.”➕
“Tetra, Aqueon, Marineland, Hydor, Jager, all should work well.”➕
“Eheim has a 25W and a 50W that would both work for a 10 gal.”➕
User experiences with budget heaters
“if anyone was on a budget, they could go for this unless if they can get a reliable heater right away.”➕
User suggests alternatives to Aqueon kits
“I'd rather spend a little bit more rather than buying trash and having to replace it.”➕
“You can do a lot better than their kits for about the same price.”➕
Heater performance varies with tank size
“You probably just need bigger heaters.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
User experiences with various brands of heaters
“Try a different brand, if not just make sure the heater is strong enough to support how many gallons your tank is.”➕
“Not sure if I helped or brought any idea's to the field but - my .02$.”➕
User experiences with Aqueon tanks over time
“Rather than spending the few minutes we sometimes get to speak when I’m gone, nagging her about whether she did a water change, I built some redundancy into my tank.”➕
Discussion about heater reliability
“So far, everything's working. Nothing like the review said.”➕
Discussion on experiences with multiple heater brands
“What brand of Aquarium heaters do you all like to use?”➕
User mentions experiences with other brands
“its super bright”➕

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