Orlushy Submersible Aquarium Heater,500W Fish Tahk Heater with Adjust Knob Thermostat 2 Suction Cups and Free Thermometer Suitable for Marine Saltwater and Freshwater (500W)

Bought for my 55 gallon tank and has reliably worked for nearly half a year as needed. Been consistent and accurate enough to keep my fish happy and warm when it's cold.Took maybe a week to adjust the temperature to exactly where I wanted it to be as it may not always be exactly how it's stated by the knob but that's super easy to adjust. I suggest you start a little lower than you want it to be and bring it up a tiny amount each day til it's exactly where you want it to be.The suction cup on the thermometer isn't the greatest. I ended up using double sided tape to hold it to the tank. But the suction cups for the actual heater have worked flawlessly and kept it secured exactly where I put it months ago. Looks good, is easy to use, should be plenty durable. I'm happy with it. And if your looking for a tank heater, look no further, you found a good one.

Item arrived in box undamaged. Works as it should. Perfect condition. Simple to set up.

Good value. It works as advertised.

I should be able to give a 4.5 or 4.75. I just can’t give it a complete 5.0. This heater made a huge difference in my fish activities. My fish tank was getting too cold, and I lost a couple of little fish because of it. Thankfully, I received my product within 24 hours of placing my order. If that wasn’t a game changer, this heater warmed up my 50 gallon long tank pretty darn quick, saving my little fish and making my bottom feeders more active. I actually had no idea that my bottom feeders would become more active with warmer water.The only reason I can’t give it a 5.0 is because the thermometer given is not accurate. It’s actually off by about 5 to 6°, as you can see by my pictures. This is not a big deal to me, as I already have accurate thermometers. However, if someone were to buy this heating system and not already have accurate thermometers, 6° can make a pretty big difference.

Works great. Nothing thrilling about a heater but does the job well.

I've been using this heater for almost 4 years now in a 75 gal and it's only now starting to have problems. It still heats, it's just permanently set at about 85 degrees now no matter what I change the dial too. Unfortunately for me I've got it in a cooler water tank. If this were a tropical aquarium I don't think I would have even noticed there was a problem.The only downside is that the dial you use to set the temperature is not very accurate, so you'll need to check the temperature with something else when you are getting it set. Easy enough to work around and an acceptable problem to me given the price.

A great gift the temperature gets really hot. It has to make sure you stated properly.

Good quality fish tank heater. Love that it comes with a digital thermometer.

Exceeded expectations. It is still running after years. This thing is built like a tank

Very sturdy. Works well

Great heater

Very handy in cold weather

Keeps consistent temperature in my 65 gallon rainbow tank. Really appreciate the electronic thermometer. I’d purchase again.