Orlushy Submersible Aquarium Heater, Adjustable Fish Tahk Heater with Free Thermometer Suitable for Marine Saltwater and Freshwater
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Availability:
In Stock.
Arrives
Friday, Aug 14
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Size: C300
Features
- Orlushy aquarium heaters come in six different sizes, suitable for small fish tanks, aquariums and turtle tanks. Please choose the right wattage aquarium heater according to our size chart.
- Stable Heating: Stair shape heating that red light is on and heater starts to intermittently heat the water to the set temp, saving energy and electricity. When green light is on, heater stops working and maintains the temperature constantly. It also come with a separate thermometer for real-time monitoring of the aquarium water temperature.
- 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.
Product Dimensions : 11 x 1.2 x 1.2 inches; 15.84 ounces
Item model number : 300W
Date First Available : September 3, 2018
Manufacturer : Orlushy
Best Sellers Rank: #1,885 in Pet Supplies (See Top 100 in Pet Supplies) #2 in Aquarium Heaters
#2 in Aquarium Heaters:
Customer Reviews: 4.4 4.4 out of 5 stars (8,337)
Item Weight: 15.8 ounces
Manufacturer: Orlushy
Item model number: 300W
Date First Available: September 3, 2018
Item Package Dimensions L x W x H: 12.53 x 3.66 x 2.25 inches
Item Dimensions LxWxH: 11 x 1.2 x 1.2 inches
Brand Name: Orlushy
Target Audience Keyword: fish
Model Name: 300W
Size: C300
Style: Tropical
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Aug 14
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: C300
It’s been seven months since I’ve bought this heater it’s had been keeping the temperature pretty good and it even tho it does hover at 72-73.5 degrees Fahrenheit I have this way because my dojo pond loach’s have to have water below 80 degrees Fahrenheit or they will experience fungal infections and ich infections there a cold water fish used to cooler temperatures somewhat similar to gold fish which are actually a cold water fish and I have a albino mini pleco algae eater some people would call it measuring in at 5 inches last time I checked and the pleco’s like temperatures in the early 70’s and early 80’s 72-82 degrees Fahrenheit is a lil bit warmer but not too much so 72 is the appropriate temperature and the Cory’s like warmer temperatures as well hovering in at early 70’s to the early 80’s 72-82 degrees Fahrenheit so to keep everyone happy or at least satisfied I keep it at 72 degrees Fahrenheit and even this it does go up a few degrees that’s fine as long as it doesn’t go below past 79 degrees Fahrenheit that fine but let’s get into the heart of the subject:how long will this cheap heater last?🤔 well for the last seven months it’s held up pretty well so I’ll eyeball it five eight years approximately not sure like I said “eyeballing” it.subject2safety well it’s hasn’t made my tank become a boiling pot of loach food so that’s a plus and it hasn’t burnt up,melted, exploded,glass or heater either or shattered,hasn’t,stopped working,cord or heater electrocuted the fish and hasn’t busted the tank which is 35 gallon bowfront aquarium to pieces like a ticking time bomb and thickness of this cheap heater well it seems to be the last time I put it in and also had felt it which I touched it because I was trying to see if it was working yes it is still working and I have three thermometers on the tank one inside of the tank and reads the temperature outside the tank it’s the one that it comes with and this is not gonna blow up in my hands or fish tank question NO it’s not gonna be so cheap that’s it’s gonna be like a cracker this if you ask me is 4th or 5th in the top five list of best heaters on the aquariumist market 1st being eheim 2nd fluval 3rd being probably United because I searched it up and so….any way fourth being I guess yes orlushy brand and fifth I guess because my mother’s tetra fish heater didn’t stop working or melt I’ll put Tetra in at 5th place because well that’s what I’ve SOMEWHAT have experience on anyway great heater highly recommended and will be buying another one of this or another variant if this brand this brand has really surprised me yet….but for now yes great heater Godbless!
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Reviewed in the United States on August 4, 2025 by Delilah B.
Size: C300
Heated my tank very well. It was very easy to put together and use.
Reviewed in the United States on July 20, 2026 by Ashley Orsillo
Size: C300
Living in Central Florida, you don't always think about extreme cold, but this past winter threw us some serious freezing temperatures. I bought this Orlushy submersible heater specifically to ensure my turtles didn't freeze when the indoor temps plummeted, and it performed beautifully. Why It’s Great for Turtle Tanks: Accurate Temperature Control: The dial adjustment is very straightforward to set. I monitored it closely with a separate thermometer, and the heater successfully kept the water at a stable, safe temperature despite the room around it getting quite cold. Turtle-Proof Build Quality: Turtles are notoriously clumsy and love to rearrange their tanks. Because this is made from thick, durable quartz glass, I didn't have to worry about my turtles cracking it or hurting themselves when bumping past it. Strong Suction Cups: The included suction cups actually stay anchored to the glass. Anyone with turtles knows they love to push equipment around, but this stayed firmly in place. Setup and Usability: It is fully submersible and easy to position. The power cord has a decent length, which made routing it to my surge protector simple. The indicator light is a great touch—you can see at a glance when it is actively heating versus when it has reached its target temperature and is idling. A Quick Tip for Future Buyers: Make sure you unplug the heater and let it cool down for about 10–15 minutes before you do water changes. Exposing a hot glass heater to cooler air or fresh water during a tank cleaning can cause the glass to crack (true for any aquarium heater!). The Bottom Line: This heater kept my turtles warm, safe, and active during a rough winter stretch. It is affordable, highly adjustable, and rugged enough for aquatic.
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Reviewed in the United States on June 2, 2026 by C&B
Size: C300
This size this power consumption aquarium heater itself are great , so far working perfectly, temperature control and adjustment are great , the price tag for the unit are very good compared to the other majors brand in the market, but the only one problem is the digital thermometer come with it , temperature show kind very tricky, set 80f but the thermometer show 85f! Then I have to buy a new thermometer
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Reviewed in the United States on May 9, 2026 by Arina
Size: C300
Put in inside my 75 gallon (filled up about half way) for my red eared slider turtles. Works really well in keeping the water nice and warm for them.
Reviewed in the United States on June 20, 2026 by Ernesto Diaz
Size: C300
I bought two of these 300w for a 75gallon freshwater tank and have had a 100w for a 10 gallon and I’ve had a very good experience with them. When researching heaters, it seems like no matter what brand or how much you spend, they can all quit at anytime or have a catastrophic malfunction and overheat. In my 2 years with the lower wattage heater, it has been very consistent and not had any fluctuations. I’m confident in the 300w heaters in my 75gal and would purchase these heaters again
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Reviewed in the United States on March 11, 2026 by Mike
Size: C300
Me encanta el diseño y funciona al 100%
Reviewed in the United States on July 22, 2026 by Jonathan Chavarria Campos
Size: C300
First on3 the glass was completely shattered. Ordered a replacement, got it installed, after it sat in the tank for 24 hours I turned it on and set to 81 F I just came home and the tank is at 87 F and the heater is still heating. Not good at all. Luckily I have no fish in there yet, but thanks for cooking all my beneficial bacteria. Appreciate that, Orlushy. I cant recommend buying something with such a wild swing in temperature, thats a great way to kill a tank. EDIT: After checking with other thermometers, it appears that the digital thermometer is also about 5 degrees off, so maybe a 3 degree swing in actual set temp, still not sure how I feel about this heater, and alot of air bubbles accumulating on the outside, it just feel so sketchy, haven't decided if I'll leave it in or skip the risk
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Reviewed in the United States on March 15, 2026 by Quintin M.