hygger Aquarium Heater 300W/500W/800W/1000W, Submersible Fish Tank Heater with Digital LED Controller and Intelligent Leaving Water Automatically Stop Heating System, for Freshwater and Saltwater

This arrived over night after my old heater failed! It’s been keeping my 135 gallon freshwater tank at a very steady 78 degrees for months!

We have an indoor pond with quite a few fish. It is hard to have a heater as it doesn't stick to the side lime it would a fish tank. This product fits the bill and has been great for the pond

Awsome so far. Would recommend

I had this for maybe 2 months when my fish started to act weird and die. Went to put my hand into the tank and got quite painfully shocked. Obviously I checked everything and deduced it was this heater. I contacted the company and they tell me a little static is normal… so I have the heater tested with a multimeter, send them proof that the heater faulty. Verify that the glass tubes are sound, there is a ground, and walked them through water changes, shutting down the heater for water changes and so on as recommended by the instructions. TWICE I go through this with support and get “we will let you know”… this is now going on two month and nothing. Really unfortunate how much money I have spent slowly switching over to Hygger products the last 4 or so years…. The customer service is absolutely crap….. picture showing the fault

I purchased this heater in June 2024. It worked great until June 2025. I followed the troubleshooting guide, but unfortunately that didn't fix the issue. I reached out to customer support and almost immediately received a response. I sent them a video of the issue and with no questions asked they immediately replaced it with a new heater and I received it 2 days later.

Second one ordered, for a new tank. First one still going strong in first tank a couple of years now. The setup, reading temps is super easy. Great product I recommend.

This is the perfect addition to your aquarium as far as a heater. Just set it and go and when your water level gets low depending where you put it it will beep to protect the heater with the added bonus of letting you know your water level is low

I purchased this heater in November and it failed in April. However, with very little hassle The sent me a brand new one in a few days. Aslong as that first one was a dud and this one lasts ill be happy. Heats well. Easy to use. Until failure kept the pond perfect.