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
Monday, May 25
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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.
Is Discontinued By Manufacturer : No
Product Dimensions : 11 x 1.2 x 1.2 inches; 15.84 ounces
Date First Available : September 3, 2018
Manufacturer : Orlushy
Best Sellers Rank: #2,077 in Pet Supplies (See Top 100 in Pet Supplies) #1 in Aquarium Heaters
#1 in Aquarium Heaters:
Customer Reviews: 4.4 4.4 out of 5 stars (8,223)
Item Weight: 15.8 ounces
Manufacturer: Orlushy
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
Size: C300
Style: Tropical
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, May 25
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
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
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
Heater appears to be well made, and keeps my aquarium within 1 degree of the targeted temperature. Arrived in good condition, no breakage, and within a lot of protective foam. Have used it for about 1 1/2 months.
Reviewed in the United States on February 26, 2026 by Phoenix
Size: C300
It took a little to get the temperature correct but is working fine now. We had to follow the trouble shooting guidelines.
Reviewed in the United States on December 5, 2025 by Christine
Size: C300
This heater works great! It keeps the temperature steady, and I really like that it’s designed in a way that my shrimp can’t get into it and get hurt. Definitely a safe and reliable option for shrimp tanks.
Reviewed in the United States on March 21, 2026 by Candace
Size: C300
I bought this at the end of 2025 to replace mine that stopped working. It's a nice heater and stays within a degree of my setting. I have it set around 77 degrees...it has stayed at 77.5 or so...no big swings in temp. It's heating a 75 gallon tank. I do have a bubble bar underneath it to keep the heat circulated. I also run an aquaclear 110 hob filter, so my water is always moving. My experience is a good one.
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Reviewed in the United States on March 24, 2026 by Aquagirl1111
Size: C300
Alright, so first things first. These heaters work, they just do not work as advertised. They do not provide a 21 F temp range. Maybe 15 in ideal conditions, and much less than that in semi-cold environments (60 F). I have three 300W's, 1 150W, and 1 100W. A 300W is perfectly suitable for a 40-gallon breeder. A 100W is suitable for a 10G. A 150W is suitable for a 20G. But, when you crank these devices to maximum power, an indoor pond of fewer than 180 gallons including an insulated bottom will not go over 75F from 60F. That's a measily 15 degrees with some serious power usage: 1,150 watts. This is not ideal for my Tilapia which require 80-86 for optimal growth and breeding. The black things on the bottom always come off. I don't even know why they bother. I believe the included (and very ghetto) temperature gauge is purely an incentive to make a cheap and inefficient product seem a good alternative to more expensive heaters. If you are running basic tanks indoors, and do not care about looks, or having to constantly fiddle with the temperature gauge knowing that it's never going to be the temp it says, this may be a bargain for you. I don't mind using them in my 40G breeder, 20GL or 10G Fry tanks. However, these are cheap for a reason. I would take that into consideration before buying them depending on your particular needs. Also, raising the prices 3+ dollars is, well, how do I put it - sending me in a new direction. These were barely a bargain due to the flaws before. I will not pay those prices for an inferior product; I will drop extra money on a better heater. I suggest you are more honest in your advertising, if my fish didn't need the heaters to survive I'd already have returned them as products that do not work as advertised. I highly advise against these heaters for anything but cheap aquarium setups. The price of all the heaters I bought combined has me wishing I'd chosen to raise trout instead. It takes my aquaculture hobby which uses next to no power and demands at least another 300 watts on top of the 1,150w I already have. That's a lot of power, which creates a big power bill. I advise you to go with another brand and save yourself this headache if you can afford too.
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Reviewed in the United States on January 19, 2020 by Thomas Wolf
Size: C300
Works extremely well.
Reviewed in the United States on April 18, 2026 by Kindle Customer