AquaMiracle Upgraded 50W Small Aquarium Heater Fish Tank Heater Turtle Heater Super Mini Aquarium Heater, Dry-Run/Overheating Protection and Memory Function, Dual LED Display, for 5-10 Gal Tanks

I wish they had a separate probe for temperature, but I don't know that it makes any difference, I've just always used that style. I am using these in both 5 gallon buckets and 5.5 gallon glass aquariums, and they are really easy to set the temperature, have a bright and easily read display, good suction cups (surprised to see these small units come with 2 cups.) as a general rule I do not use glass heaters, but because these are temporary while I set up a sump, I didn't want to spend the money on titanium, and I don't even know if titanium heaters can be purchased at this low of a wattage. The glass seems plenty thick and the large rubber bumpers on the top and bottom stick out enough that they should be pretty durable. I think for the money these are great heaters, and even after I am done with them I'll be happy to have them around as backup. I've been running them for a few weeks so I can't speak to longevity, but they are doing their job, and as long as you do your part placing them properly in an area with good flow, they are very stable. Unlike another small cheap heater I have that came with a tank, these stay in place, so I feel safer about them not falling against some hardscape or getting buried in substrate.

Great little heater. Low profile in tank with digital temperature display outside of tank. I would buy again at this very reasonable price.

The media could not be loaded. Don’t know why my video is so blurry, but this heater is pretty easy to hide, not much of an eye sore and keeps the temperature at a consistent temp. Easy to set and I can actually see it working. It tells you the temperature of the tank, but I keep the thermometer I got with the tank just to see its consistency. My tank is a 5 gallon and the water has stayed at the perfect temperature. My shrimp hang out on the cord too.

So far it works great!

Works as intended.

using it on a 3 gallon tank and it regulates the water temp as it should, digital display of current temp and set temp is a nice feature

I bought a different model with the same form factor 2 years ago and loved it. But it died last week. I bought the AquaMiracle for its form factor but it was a fraction of the cost of the original. It actually works fine, but I have two observations: 1) The power cable is much shorter than ideal. Because of a peculiarity of my setup, I can get by without using an extension cable but many users will require one. 2) The temperature indication is 2 degrees F. high. I.e., if I want the tank to be at 80 degrees F., I need to set the control at 78 degrees. I'm using several "stick-on" contact thermometers that I've used for years, and the previous unit was always right on the money, so I know that I can trust them. Two small matters, but they account for the 4-star rating. I would STILL buy it again.

I use one of these in each of my 3 gal and 15 gal.While I love that I can turn up the temp easily with the external button, the temp gauge is not accurate. It will tell me the heater itself is to temperature, or even above the correct temp, and then stop heating the water. Meanwhile the water will stay 5+ degrees cooler and I’ll have to monitor it with an outside thermometer.I love the size and ease of temp change but hate how inaccurate it is.