hygger Small Aquarium Betta Heater, Submersible Fish Tank Heater 10W/25W/50W/100W with LED Digital Display, Suitable for Marine Saltwater and Freshwater up to 5/10/16/26 Gallon

Small but works well in our tank. Suctions work great, once positioned correctly. Thermostat’s easy to set and keeps temperatures at that setting.

I've only had this heater for a week but so far it is working spot on and keeping my tank at the perfect temperature. It's been many years since I used an aquarium heater and I can see great improvements in the technology. I particularly like the small size and that it's submersible all the way under the water. The dial and control mechanism are on the outside and have a nice digital display, and I like all the built-in safety features that come with this particular model. For now I truly give this five stars. Hopefully it will hold up over the many months to come and unless something goes wrong I will keep this review at five stars. I highly recommend this product.

Awesome so far! Using in my chicken waterer and works perfect. You can see the current temp all the time and set it at good temps for the water. It keeps it nice temp in the freezing weather. PERFECT BUY IT!!!!

It works well so far and easy to use. I only gave 4 stars because it reads a couple degrees different than my thermometer, but that could be a standard deviation of both. Good size for my 5 gal betta tank.

My anxiety said "There are so many things that could go wrong. What if it fails? What if it cooks my turtle? What if..." The list went on. After multiple conversations with my father, who has maintained various aquariums since I can remember, he finally agreed to do the research for me & this was the one he landed on. So far, I have only panicked once - when I heard what I described (to my father & Google) a freaking noise. Turns out that unless there are other signs of failure or distress from my turtle- it's probably due to the heater warming the water. If I could get Shelly (what my granddaughter named the turtle) to stop pushing the plastic plants up against it, I'd be settled. Anxiety aside, So far the temperature has been consistent, and there haven't been any issues with the heater. I'm happy with the performance & Shelly seems happy too.

Decent little heater so far. Easy to set temp and so far seems accurate. 10w is heating my 5 gallon betta tank in my kitchen .

Okay, no more Chinese company products for me (well, maybe Chihiros). 1. Build quality for the heating element seems pretty good but the controller box is really cheaply made. I guess Hygger saved a few bucks using low grade plastic. 2. The real issues are its ability to keep a reliable temperature. First, the temperature reading itself is off 2 degrees F. I've verified the actual aquarium temperature using an H&M TDS meter, Apera TDS/PH pen, and an Inkbird controller. Trust me this thing reads way off. Second, the set temperature "wigs" out. I ran the heater for about 6 hours at a set temperature of 75 degrees (which in reality was holding the aquarium temperature at 73 degrees). So literally the display read 75 degrees as the temperature the heater was to maintain. I then go to bed and 8 hours later, I come back and the aquarium's actual temperature is 70 degrees and the temperature on the controller box was set to 72 degrees. I don't have kids and my wife never goes near the aquarium. So how the SET temperature changed is beyond me. Unreliable junk. The only pro is that theoretically you can set the temperature digitally without faffing around with a dial.

I purchased the 50w. I've had it for over a month and so far keeping the water temp at what I set it to! I love that its small and easy to hide with plants. Perfect for my 10 gallon tank. Will definitely buy again

Lo uso en acuario nano para camarones, es muy preciso y eficiente. Tamaño pequeño y muestra en tiempo real la temperatura del tanque con un termómetro digital

Will not stick to the tank - piece of junk

Quality product for the cost! Helped my fish from dying in the cold water from my AC!

Tenía el modelo de 25w en un acuario plantado de 5 galones. Las primeras 3 semanas funcionó a la perfección manteniendo el agua a 25ºC constantes hasta que hoy note que estaban saliendo burbujas muy pequeñas del caucho de abajo que protege el calentador y al ver la temperatura la había subido a 34ºC y a pesar de que la lectura del display estaba bien, no dejaba de calentar… me parecía un producto bonito sobre todo por el tamaño pero creo que no vale la pena arriesgarse y mejor comprar una marca más establecida.