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

Like the design. Easy to use. Function perfectly, and its durability is good. A little hard to adjust heater temp.

Love the heater. I am using this heater for my 10gal tank. The adjustable temperature knob is easy to access and set. I keep my temperature at about 80F and the tank's temperature stays at that value. I temperature strip is included in the product and it works pretty well.

Works great in our 10 gallon. The dial knob at the top to adjust temperature can be a little tricky though. There is a 4 degree label gap between temps so you have to guess. Ex) 78-(gap)-82. So if you want 80 degrees, you adjust the dial in the middle of these two numbers. Not a big deal, but with me being new at fish keeping, I worried it wasn’t at perfect temperature. Other than that, it’s a good product!

Great product. Heated very fast however the reason I am not giving this 5 stars is because the knob to change the temperature was a bit difficult to turn.

Heater works great but the thermometer doesn't work at all!

I couldn’t be more satisfied with this aquarium heater! It’s compact, easy to install, and has been consistently reliable in maintaining the perfect temperature for my fish tank. Worth the price !

PLEASE DO NOT BUY THIS! I just had a devastating loss in my tank because this thing decided it wanted to get hot and melt all all the plastic clips. It probably shocked my entire tank!I just did a water change on my 10 gallon tank. I always shut down my heater, filter, and air bubblers. Once the water gets high enough to cover the heater, I start everything up again. Jesus, I had just put the last gallon of water in the tank and all I could see was smoke. I thought it was my light, but it was coming out of the water because everything was melting. I switched the main power button on my surge protector. My fish started flopping and sinking to the bottom. I had a net that I was able to catch a few tetra fish that were at the top. My shrimp darted to the top of the tank, then nose dived to the bottom and turned upside down.I am so upset right now. I just lost 5 fish and a dozen shrimps. Probably will lose my assassin snails and two other tetra fish that I was able to get out of my tank. I have several pest snails that are now laying on their sides that will probably die. But those are not such a big deal. I spent nearly 6 months on this tank getting everything right. I just didn't have a heater, and opted for this one because of all the "Wonderful Reviews". Don't do it people.I am adding photos, not of my fish that were loss.

This aquarium heater is keeping my tank at a steady temperature, and it was easy to set up. So far, it’s working perfectly, and my fish seem happy. I’m hoping it lasts a long time, but for now, I’m very satisfied with the performance.