Search  for anything...
PULACO

PULACO 25W Small Aquarium Submersible Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉)

    • Based on 11,017 reviews
Condition: New
Checking for product changes
$9.99 Why this price?
Save $2.00 was $11.99

Buy Now, Pay Later

As low as $2 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Apr 15
Order within 17 hours and 16 minutes
Available payment plans shown during checkout

Recently Viewed

Model: 25 Watt-Under 6 gallon


Features

  • Betta Heater: This Fish Tank Heater should be 100% submerged into water, Ideal for small glass or acrylic desktop aquariums up 1 to 6 Gallons, not suitable for less than 1 gallon tank.
  • Quick and Easy Installation: Vertical or horizontal placement using, Aquarium heater automatic temperature control 78F, no need to adjust temperature, easy to operate, fishes happy.
  • How it Works: Plug in, red light turns on, the heater will start working until water temperature up to 78F, and red light off, then the green light will turn on, heater stop working and keeping constant temperature 78F. Accuracy:3F
  • Note: Do not operate or leave product plugged in when your water tank is out of water, heater should be fully submerged into water. Please install a water pump or filter to help water circulating while heating.
  • SATISFACTION GUARANTEED: Our Aquarium Heater is built with durability in mind and safety for every design. In the remote possibility that youre not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.

Brand: PULACO


Special Feature: High Accuracy


Color: Transparent


Age Range (Description): Adult


Included Components: heater


Outer Material: Acrylic


Display Type: Analog


Product Care Instructions: Wipe Clean


Unit Count: 1.0 Count


Model Name: PL-Heater


Product Dimensions ‏ : ‎ 5.5 x 1.2 x 2.7 inches; 4.2 ounces


Item model number ‏ : ‎ PL-168


Date First Available ‏ : ‎ November 18, 2019


Manufacturer ‏ : ‎ PULACO


Country of Origin ‏ : ‎ China


Best Sellers Rank: #3,693 in Pet Supplies (See Top 100 in Pet Supplies) #7 in Aquarium Heaters


#7 in Aquarium Heaters:


Customer Reviews: 4.3 4.3 out of 5 stars 11,017 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Apr 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • SATISFACTION GUARANTEED!
First of all, I buy a LOT of STUFF on Amazon and I almost never give reviews. Why? Because I'd be spending an un-Godly amount of time just writing reviews so I skip it. However, I HAVE written reviews. What motivates me to write a review when usually I just SKIP IT? What motivates me is when I receive a product from a buyer on Amazon that blows my socks off and is BEYOND my expectations. I have bought many thermometers over my fish keeping years. Left the hobby for awhile (I should say, "Left the Lifestyle') & when I came back LO & BEHOLD, Nano Tanks are the rage. Nano tanks and I am very fond of planted glass bowls (I'm about to try a new Walstad bowl- CYS-EXCEL 13.5"h x 15.25" across on Amazon) Consequently, I have purchased many, many small heaters for my smaller glass bowl and a 7.11 gallon 11.8" x 11.8" x 11.8" Landan Nano Cube (Amazon) in which I wanted a small heater that couldn't be seen. ALL the small heaters I tried were failures at maintaining the status quo temp I was seeking. They couldn't hold 78°F water temp. no matter how small the aquarium / bowl. So I had this big-ass honkin' heater in my 11.8" cube and THAT did a great job but too bad it's HUGE and is easily seen as a big ass THINGY in my cube. I stopped heating the bowl. The little Nano heaters I was buying for the bowl couldn't even maintain my bowl temp. and that was my small bowl at about 2.5-3 gals. Now I just bought the larger 4 gallon bowl and it LOOKS Huge but still small relative to the cube. So I'm thinking...I better look HARDER for a good mini-heater and I landed on this PULACO 25W heater. One of my criteria for buying on Amazon are the reviews. Not just written review content but HOW MANY reviews the item has. The PULACO 25W heater has over 10,500+ reviews! WHAT!? Now, I'm interested! It's PRE-SET to 78°F so that's what I want in my Nano and my bowl. If you have a situation where you are keeping animals or plants where you want it warmer or cooler i.e. you don't want 78°F. Then this is NOT the heater for you. Seventy-Eight Degrees. That's it. But it's a reliable 78°F and I check it regularly two different ways. You will actually receive a small 'Stick On The Side' thermometer which I stuck on the Nano side wall. I also bought an Etekcity Infrared Temp Gun (Amazon) which I take temps of everything. I heat replacement water for my Nano tank up to the current temp and I'm taking their temps with the Infrared gun. Both the cheap 'stick on' sticker and the Infrared gun confirm---> 78°F !!!! I was shocked and surprised that this little guy...the PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip did EXACTLY what it was advertised to do. Heats water up to 78°F and holds it steady at that temp. I even experimented by using it for a week in the 7 gal. Nano and it held 78°F as advertised. So, despite it's diminutive size which I LOVE LOVE LOVE it's only supposed to be rated up to 6 gallons. To be honest, my Nano probably has 6 gal. in it once I subtract the substrate, the hardscape, the plants, etc. Anyway this little PULACO 25W is also a PLUG 'N PLAY. All you do is plug it in! It's easy to use and you can easily hide it for your viewing pleasure! I just want to comment on the negative reviews. I know that there is mixed feedback on durability, performance, quality heating value (whatever the definition of THAT is!) but I have not had an issue and I've been using the hell out of it for two months. I don't understand the complaints about glass breaking? Now, I haven't been rough with this PULACO 25W glass heater, I haven't bumped it against the aquarium or bowl. I believe that ALL GLASS HEATERS are prone to breakage (especially if you have some age on that glass heater!) and YES, I believe you could break this little PULACO with the wrong move (glass is breakable!) but I find it hard to believe that the glass would break with normal use. Just sayin'...how do you break a glass aquarium heater? It doesn't take much imagination to picture it breaking...now picture HOW it got broken. Another interesting aspect of this heater is that on my little 11.8" cube (about 6 gals) I am running not one, but TWO EHEIM Canister filters. Both are the small EHEIMs (Filter 2211 -'Classic 150') but still... I am moving a LOT of water using two EHEIM Canisters on that little cube but that little PULACO 25W handles it, keeping the water at 78°F even though I am moving so much water through the two canisters. I think that it's not only interesting but important to know that the little heater is a solid choice. LAST BUT NOT LEAST----> remember my headline? SATISFACTION GUARANTEED! Here is your promise from the manufacturer: ★【SATISFACTION GUARANTEED】Our Aquarium Heater is built with durability in mind and safety for every design. In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service. And, of course, if you find that you don't like it right away, return to Amazon for your refund. And NO, I don't work for the PULACO people in any way, shape, or form. Out of all the crap I buy on Amazon, I write this because it's a product that I believe in and I have run the gamut of small heaters, all the rest failures. ... show more
Reviewed in the United States on July 2, 2024 by Bobby Magic
    • Heater for small tank
Just received this for my 2.6 fluvel tank. Just plug in and it keeps the temp at 78 degrees..works great so far. Just make sure in submerged into water before you plug in. I Woolf recommend.
Reviewed in the United States on February 8, 2025 by maria lupo
    • Works great!
I needed a heater for my betta tank since it's getting colder and this was perfect! It was really easy to install (literally just plug it in and suction cup it below the water level) and keeps the tank water slightly above room temp which is perfect for my fish. I would keep in mind it has a SET temperature of 78 degrees which you cannot change! The reviews of it overheating and "cooking" people's pets scared me, but I just watched it like a hawk the first day I installed it to make sure I didn't get a faulty one. I've never had an issue! Well worth the price:) ... show more
Reviewed in the United States on November 16, 2024 by Ruthie
    • ubmersible Betta Heater
It was good for small aquarium i return it back. Thanks
Reviewed in the United States on February 11, 2025 by Asif Zia
    • Love this
This is perfect for my ten gallon tank. It keeps the water at a steady temperature. It suction cups to the wall of my tank and has never fallen. Cleaning is very easy you just run it under warm water and use your hands to wipe it off under the water and anything on it comes right off. Now the most I have had grow on it is algae because I keep my tank pretty clean but the tank is next to my aqua garden that has a grow light to simulate the sun so sometimes it grows a little algae. But over all I 100% recommend this heater! ... show more
Reviewed in the United States on January 18, 2025 by Kylee N.
    • Works great, so far
The little heater arrived on time and very well packaged. I am using it in a new 3-gallon aquarium and it brought it up to temp in a short time. Working great so far!
Reviewed in the United States on January 31, 2025 by LRS
    • Cheap but totally functional
Well, afert 3 years and 1 month, the heater stopped working, the inner wire resistance broke. But honestly for what I paid I didn't thought it was gonna last that much, I think 3 years is enough time to say it actually works I never had problems with it, always kept my betta fish warm and on a constant temperature Just like a reference, my fish tank it's about 3 gal, glass bubble shape and has a waterfall. I took good care of my heater too, wash it, clean it and super careful cuz it's made of glass and I didn't wanted to chip it. I'm buying the replacement as I'm writing this review ... show more
Reviewed in the United States on January 12, 2024 by NICTE L.
    • The little heater that didn’t
So I guess I read the description too fast, I thought it was rated for a 6gal, but it actually says UNDER 6 gal. But hear me out, this thing has a light in it that turns red when it’s heating and green while it isn’t. It’s almost ALWAYS green. So, I feel like it’s actually just not keeping my 6gal at the correct temp. If it were trying, and failing, to keep the “too large” tank at the correct temp, the light wouldn’t be green all the time. It’s keeping my 6gal at a steady 76/77, not warm enough so I ordered a 50 watt from a different brand with controls to adjust the temp. So, if you have a 6gal, go with a 50w heater. ... show more
Reviewed in the United States on November 27, 2024 by StephE

Can't find a product?

Find it on Amazon first, then paste the link below.