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HITOP 25W 50W 100W 200W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cup

  • Based on 8,197 reviews
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Availability: Only 10 left in stock, order soon!
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Arrives Wednesday, May 6
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Size: 300w


Features

  • [Aquarium heater]: HITOP 300W aquarium heater, length 10.4-inch, power cord 4.9ft, designed for small fish tanks, recommended for aquariums 45-60 Gallons.
  • [Adjustable and easy to use]: This aquarium heater, adjustable temperature range 68 ~ 93 F, after setting the temp you want, will on or shut off automatically when the water temperature changes, no extra adjustment is required.
  • [Accurate Temperature Control]: This fish tank heater built-in thermostat, will automatically keep the water at the set temperature within2F error. Comes with an sticker thermometer to detect water temp at any time.
  • [Thickened glass]: 2mm thickened quartz glass, 33% thicker than normal aquarium heaters, much safer for both human and animals.
  • [Accessories]: A stick-on thermometer, and three suction cups meet your needs. We provide 12 months after-sales service.

Package Dimensions ‏ : ‎ 13.3 x 3.19 x 1.85 inches; 10.23 ounces


Date First Available ‏ : ‎ January 3, 2020


Manufacturer ‏ : ‎ Haisen


Best Sellers Rank: #3,291 in Pet Supplies (See Top 100 in Pet Supplies) #6 in Aquarium Heaters


#6 in Aquarium Heaters:


Customer Reviews: 4.3 4.3 out of 5 stars (1,241)


Item Weight: 10.2 ounces


Manufacturer: Haisen


Date First Available: January 3, 2020


Item Package Dimensions L x W x H: 13.3 x 3.19 x 1.85 inches


Brand Name: HITOP


Target Audience Keyword: fish


Directions: This product needs to be completely submerged in water to use.


Size: 300w


Included Components: 1pc sticker thermometer, 3 strong suction cups


Specific Uses for Product: Heat water to maintain the temperature of the fish tank


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 6

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.

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Top Amazon Reviews


  • Temperature knobs hard to adjust
Size: 300w
Seems to work well. Had trouble getting the tempature adjusted so I didn't cook my fish. But seems to be at the right seeing now. Fish seem happier and swimming around lil more. Suction to side of tank works well.
Reviewed in the United States on November 4, 2025 by jill weekley

  • Good heater
Size: 300w
I was looking for a heater that would stay at the same temp and stay warm even in the cold and I have to say this is the best one I’ve ever had. I have a 29 gal and got the highest watt it’s affordable and works very well it’s worth it.
Reviewed in the United States on January 30, 2025 by Olivia

  • Was skeptical but…
Size: 300w
I’m using these for a 90 gallon reef aquarium, for the price I was skeptical. I’m using 2 of them and controlling them with an Inkbird digital temp controller that I had laying around. This allows me to dial in precise temp and adds overheat protection, so I really just needed simple heaters. These are maintaining all 90 gallons right at 78 degrees. Not sure one would do it. Also, by using 2 I get failover protection, if one fails I still have some heat source until I can replace. For the money and what I need it’s a great value. Kinda wish it wast coil heating but it works. ... show more
Reviewed in the United States on January 15, 2025 by Roger M. Stellers

  • Great heater!!!
Size: 300w
For the life of me, I don't understand why some heaters do not show a temp guide on them (so you can adjust temp). The previous heater I purchased had to be returned for only having a few grooves and no numbers. This one clearly shows the range of temps you can set up your heater to. Works like a charm. Effective. Economic. Great purchase! My fish are very happy! ... show more
Reviewed in the United States on March 16, 2024 by Raindrop

  • Good quality !!
Size: 300w
Bought 3 for my turtles . They work great for what I needed them for . They have to be fully submerged or will burn up . I made that mistake the first time I bought one that I didn't submerge the heater . Very easy to install . My tank is 100 gallon and keeps the water warm and comfortable for the turtles . Very pleased with the heaters . ... show more
Reviewed in the United States on November 10, 2023 by jolanda anderson

  • Strong heater
Size: 300w
Very strong heater.
Reviewed in the United States on December 6, 2025 by ryross

  • very nice heater but FAILED three months later
Size: 300w
Works well. Bought the 300w unit for a 90 gal tank. Well packed, good instructions, easily set temperature. Pleased, recommended.. UPDATE Bought in November, feeding fish in January noticed the water was cool. Light in heater was still on, changed the temperature setting on the heater but still no heat being produced. No water in tube so presume an electrical failure inside. ... show more
Reviewed in the United States on December 4, 2025 by pumper

  • Great
Size: 300w
Nice
Reviewed in the United States on November 1, 2025 by steve postlewait

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