Orlushy 25W Small Submersible Aquarium Heater, Constant Temperature Betta Fish Tank Heater of 78℉for 1-6 Gallons Freshwater & Saltwater Tanks
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Availability:
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Arrives
Thursday, Jul 30
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Size: 25W
Features
- 25W Aquarium HeaterOrlushy 25w fish tank heater can be applicable to 1-6 gallons tank. It is 4.7 inches in length, ideal for use in low water level and wont take up mech place, easy to hide in small tank. Please fully submerged the heater vertically into water in fish tank, and horizontally into water in turtle tanks.
- Easy to Operate This aquarium heater is automatic constant temperature heating when the power is switched on. The preset temperature is 78F. Accuracy is 3F. Stair shape heating that red light is on and heater starts to intermittently heat the water to the preset temp, saving energy and electricity. When green light is on, heater stops working and maintains constantly 78F.
- Durable & Material The durable material of the heater ensures safe operation. The outer shell covering the whole body of the heater is made of heat-resistant ABS material that it wont deform and melt under high temperature. The heating rod is made of nickel-chromium heating wire to faster heating rate, and non-corrosive quartz glass.
- Cautions 1.Please ensure the heater is 100% submerged into the water before plug in the power. 2. Please unplug the power and cool down the heater for 10-20 minutes before taking it out to clean the fish tanks or change the water.
- Guaranteed Customer Service Orlushy fish tank heater is made with great safety and durability for use. We guarantee 1 -Year warranty. If there is any issue with our product, please contact us, and we would gladly offer you after-sales service.
Description
Orlushy is always on the way of innovating and optimizing our products. Pursuit of excellence is our unceasing goals. We are committed to bring every aquarium enthusiast high-quality and stable aquarium supplies, reducing most of your worries and unnecessary fuss in each growing process. Both the novice and advanced aquarist can easily get started with our products. Visit the Store Visit the Store Visit the Store Visit the Store
Package Dimensions : 5.47 x 3.62 x 1.77 inches; 4.66 ounces
Item model number : CN25W
Date First Available : August 28, 2022
Manufacturer : Orlushy
Best Sellers Rank: #2,411 in Pet Supplies (See Top 100 in Pet Supplies) #2 in Aquarium Heaters
#2 in Aquarium Heaters:
Customer Reviews: 4.0 4.0 out of 5 stars (2,199)
Item Weight: 4.6 ounces
Manufacturer: Orlushy
Item model number: CN25W
Date First Available: August 28, 2022
Item Package Dimensions L x W x H: 5.47 x 3.62 x 1.77 inches
Brand Name: Orlushy
Target Audience Keyword: fish
Size: 25W
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 30
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 25W
Its a really good lil heater i bought it about 3 months ago and my betta loves sleeping on it for some reason. Also dw it wont burn your fish to a crisp bc like i said my betta likes sleeping on it instead of the plant leaves so if you have a betta with no place to sleep i suggest you put the heater as close to the surface as possible and make sure its still completely submerged like the instructions suggest and maybe your betta might like sleeping on it. Also when my idiot brother didnt take care of his betta about half the water evaporated outta the tank and he never topped it off so the heater was sticking out like a sore thumb so when i took his betta (bc hes so irresponsible) i actualy saw the heater was STILL WORKING! even tho it wasnt even in the water and it was still plugged in the wall all that time, it never even burned out or over heated. Pretty good lifespan considering it was halfway out of the water for about a month or 2 idk bc my idiot brother neglected the poor betta for who knows how long (Dw guys the betta is in safe hands and dw they arent sharing the same tank or even near each others tanks) I rate 5 stars for how long it lasted, its pretty cheap price and also that my betta thinks its very comfortable to sleep on. My betta loved it and even when i took my brothers betta i put together a new tank and let it cycle so while it did that i had to put his betta in a tupperware with that heater and i actualy caught his betta sleeping on the heater to so this is essentially a heater and a bed for bettas! ill put an image to show you my brothers previous tank with the heater in it to show you it was still working even tho it wasnt completely submerged for about a month or 2. Even if it breaks ill most likely buy another one from this seller bc of how cheap and hardy they are, it already lasted a couple months out of water so i doubt it will break anytime soon and my heater is already 4 months old and doing great so id say these are pretty good quality heater for the price they are selling for and also very comfortable for both of the bettas to sleep on bc of the plastic guard that wont cook them but rather keep them warm at night!
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Reviewed in the United States on October 16, 2025 by Althea
Size: 25W
This item is great, but I accidentally took it out of the water when I was cleaning my tank and left it plugged in it totally started melting and burning up. Make sure if you take it out that you put it in some more water or unplug it and let it cool off first, but it works really great in fact, it still works after melting partially. Just be careful that you don't make my mistake.
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Reviewed in the United States on July 2, 2026 by Cara
Size: 25W
first unit showed up broken (not from shipping, manufacturer error in the glass portion,) second one worked for about 2 months then just stopped. Green light comes on, etc but it is NOT heating at all as my tank started to plummet temp wise. not worth the trouble unfortunately.
Reviewed in the United States on July 8, 2026 by R D
Size: 25W
Works great, easy to use and cheap.
Reviewed in the United States on July 17, 2026 by Gradyn
Size: 25W
This heater is a great fit for small tanks, especially if you’re keeping something like a betta. It’s compact, easy to hide, and doesn’t take up much space, which matters a lot in smaller setups. What I like most is how simple it is. You just plug it in and it automatically maintains the temperature at around 78°F, which is ideal for most tropical fish. There’s no guesswork or constant adjusting, it just does its job. It heats consistently and keeps the water stable, which is really important in smaller tanks where temperature can fluctuate quickly. The size is also a big plus, it’s only a few inches long, so it doesn’t clutter the tank visually. That said, the trade-off for simplicity is control. You can’t adjust the temperature, so you’re locked into the preset range. Also, like any small heater, it’s important to make sure it’s fully submerged before plugging it in. Pros: – Perfect size for small tanks (1–6 gallons) – Simple to use, no settings or adjustments – Maintains a stable temperature – Easy to hide and doesn’t take up space Cons: – No adjustable temperature settings – Must be fully submerged to use safely – Not suitable for larger tanks Overall, this is a great option if you want something straightforward and reliable for a small tank. It’s especially good for beginners or anyone who doesn’t want to deal with adjusting settings, just plug it in and it works.
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Reviewed in the United States on April 28, 2026 by Jennifer Leyba
Size: 25W
This is the perfect lil' heater for my 5 gallon betta tank. I've tried the other brand heater that rhymes with tiger, and was dismayed to find that it flashed an "error" display exactly one year to the day after installation. Looked it up, found out that was its termination notice. Can't risk keeping it in the tank after that. Back online to search for a replacement, no "tiger" brand ever again, though. My Orlushy however, continues to function perfectly at 18 months in. It may be an exaggeration to say that I love this heater, but any fishkeeper will understand the joy you experience when an important component of your aquarium setup works as promised, no glitches, no catches; happy and healthy fish! That earns something pretty close to love, IMO.
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Reviewed in the United States on February 3, 2026 by A. Ryan
Size: 25W
Great little inexpensive heater. I added this to a small 2.5 gallon shrimp tank and it's working great. No manual adjustment, which is fine. I will say it does struggle sometimes on incredibly cold days (it's in the basement and it's in a room that has the door shut 24/7 and no heat supply, so its always about 60 degrees ambient in the winter) but by that, i mean it might drop to 76 degrees or so for a few minutes. The compact size and clean, simple aesthetic is what really made me choose this one specifically, and I don't regret it. I will definitely buy another of these next time I'm in need for a small heater.
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Reviewed in the United States on November 12, 2025 by Hunter R.
Size: 25W
I was hopeful the heater would work because of all the reviews, but unfortunately it is only partially heated and the tank has not warmed. I love the design, size, and quality, besides the fact it didn’t work.
Reviewed in the United States on February 20, 2026 by Evelyn