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AquaMiracle 25W Small Aquarium Heater Fish Heater, Super Mini Fish Tank Heater Turtle Tank Heater for 3-5 Gal Tanks, with Dual LED Display, Dry-Run/Overheating Protection & Memory Function

Free shipping on orders over $29.99

$15.99

$ 7 .99 $7.99

In Stock

1.Size:50w


  • ULTRA SMALL SIZE – This aquarium heater is incredibly compact, measuring just over half the length of traditional fish heaters! Its innovative design solves the problem of bulky aquarium heaters, taking up less space while still providing powerful heating capabilities.
  • INVERTER TECHNOLOGY – This fish tank heater uses advanced inverter technology to heat water faster and more efficiently. It maintains a constant temperature and has a longer lifespan.
  • ACCURATE EXTERNAL THERMOSTAT – The built-in chips ensure precise temperature control with an accuracy of 1F. This is far more precise than the traditional knob-controlled heaters. The digital display on the external thermostat provides 2 readings – the current temperature and the desired temperature – making it incredibly user-friendly.
  • HIGH-QUALITY MATERIALS – This fish heater is constructed with durable nickel-chromium heating wire and highly heat-conductive sand. It is encased in a shatter-proof quartz glass tube, ensuring exceptional reliability and durability. Silicone protectors on both ends prevent any accidental damage to the fish tank glass.
  • INTELLIGENT SENSORS FOR PROTECTION - The turtle heater will automatically shut off if the water level is too low (DRY-RUN) or if the water temperature exceeds 97F (OVERHEAT). Additionally, the heater features a MEMORY FUNCTION that retains the last setting in case of a power outage. Say goodbye to the risk of "cooking" your fish!



Product Description

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Choosing the right aquarium heater involves considering:

  1. Room Temperature
  2. Aquarium Water Volume
  3. Desired Temperature

  • Allocate 2.5 to 5 watts of heating power per gallon of water in your aquarium.
  • For instance, a 10-gallon aquarium would typically require a 25- to 50-watt heater.
  • In colder rooms, opt for a more powerful heater, potentially exceeding 5 watts per gallon, to effectively warm the tank.

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Indicator & Dual Temp. Display

Red light indicates active heating, blue light signals temperature maintenance. Digital display shows current & target water temps.

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Easy Setup

One-button operation adjusts temp by 1°F. When the temp reaches 93℉, pressing the button again will reset it to 59℉. Hold button 5 sec. to switch between ℉ and ℃.

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Suction Cups

Conveniently attach the fish tank heater securely to tank walls using included suction cups.

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Comprehensive Preparation for Unforeseen Circumstances

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Dry Run Protection

Error code (E1) activates if the fish heater not fully submerged. Submerge to clear code and resume proper functioning.

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Overheat Protection

Heater auto-stops(displaying "HH") if over 95°F/35°C, resuming when the water cools below 93°F/34°C.

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Memory Function

Thermostat retains last temperature setting after power outages, ensuring the turtle heater resumes previous operation upon restoration.

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Andrea Burchell
2025-08-17 15:30:10
Purchased this heater for my Fluval 45 liter Edge tank. It fits nicely in the pump chamber in back, so it’s not obtrusive. It would be easy enough to conceal if you had to put it in the main body of the aquarium=m, though. Easy to set, accurate and reliable. I like that it has both its own digital thermometer and a setting indicator readout. Cord length is generous, so routing wasn’t a problem. A well-thought-out product.
Customer
2025-07-19 13:19:41
So far so good. I’ve had it in my aquarium approximately 1 month and it appears to be working great. I love the feature that it a thermometer and heater in one function.
Dana M. Shipman
2025-06-12 12:14:18
I bought 2 (50w) for 40 gal breeder. One heater couldn't keep consistent temp(probably because it died). These are working well at keeping consistent temp @78⁰
David B.
2025-05-27 16:54:39
I did not like this heater but it works fine. I think it needs water flow to heat the whole tank. I don't have a water mover other than the air stone.
Alfred Dale Smith
2025-05-19 17:12:09
I am amazed at the quality of this little heater.
Brigitte
2025-04-25 10:05:52
Fits perfectly in my 3 gal quarantine tank. The build is sturdy and of good quality. The only annoying thing is how close the control/thermostat is to the plug. It's impressive enough, that I plan on buying the 50w for my 10 gallon tank to replace the ugly bulky heater.
Martin Luke
2025-03-04 11:09:17
I was setting up 3x new shrimp tanks and these heaters caught my eye due to the compact nature of the heater along with the dual display containing both the thermostat and the current temperature. When I received the three, I set up the tanks (all three were set up side-by-side using the same exact materials within). I set all three to heat to 73 degrees. Almost immediately after set-up, two read 73, but the last one read 78. I own an instant-read thermometer that I use for cooking that I used to confirm what I already knew: that one was a dud and the temp of the water was 73ish degrees.Since I have Prime, it wasn't a big deal as I just exchanged it. When I received the replacement, it was also a dud reading 76-78. No wanting to give up since the other two seemed to be working and because I liked the compact design, I had Amazon replace it again. It all seemed well and fine until last week when one of the two original heaters started reading 80 degrees. I KNOW for a fact it was a dud because I happened to be in the room when the temperature literally rose from 73 to 80 within 2 minutes time.I really can't recommend these heaters as they are remarkably inconsistent/faulty. I hope this review helps someone out there steer clear of these things.
Sara
2025-01-06 11:03:46
You can see what your tank temp is at and what it is set at with this heater. Highly recommend
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