hygger Aquarium Heater, 500W 800W 1000W Submersible Fish Tank Heater with LED Digital Display Over-Temperature Protection and Automatic Power-Off, for Saltwater and Freshwater Tank up to 240 Gallon

So far so good. I like the digital display so I can see the status of it at a quick glance. It seems a little large for my tank, but that's ok. It is very easy to install and set up. The controls are mid-line on the power cord, so you can set the temp or change it with out removing the heater or getting your hands wet. It does a great job of maintaining the temp to within a degree of what is set.

Heater worked great at first. I don’t know why but the heater malfunctioned melting itself and a hole in my pond draining the pond overnight so I woke up to a bunch of dead Koi. I was completely heartbroken.

Bought as backup to the same model I just had to put in as the previous heater crapped out as they always do after a couple years when you least expect it. Very easy to setup and has a highly visible digital temperature display. Highly recommend. Always keep a backup handy if you value the lives of your fish.

Other than the suction cups , it's working good so far. Only had it a while

Excellent heater. Very accurate maintains water temp in my 125 to within 1/2 a degree. Excellent quality.

Really nice unit. Two large titanium blades gives a lot of surface contact. Rally easy to read screen control to change temp super simple. Customer service very responsive, and look at their warranty on the unit. Overall very happy.

Works well when it actually works .... Out of the 5 i brought, 1 did not work upon arrival and another just randomly stopped working. The from part of it peeled off inside the tank on all of them

Last about a year, then overheated and killed my 9 year old turtle.