MQ Titanium Alloy 500W Aquarium Heater for Salt and Fresh Water, Digital LED Display Submersible Heater with External Thermostat Controller, for Fish Tank 70-80 Gallon

I ordered one for my 75 gallon tank and it has kept it on temperature perfectly. After having it for 3 months I went ahead got another as a backup. I do believe the thermostat may be a degree off, but that can be checked and adjusted to account for with a thermometer. I recommend this product.

Bought this aquarium heater in 2022 for a salt water aquarium project which I finaly completed 1.5 year later. The heater worked fine for 2 days then an E1 error code showed and the heater shut down. After cleaning the heater per instructions an E2 error code showed . I left the heater submerged in the tank for 24 hours and the error code disappeared. I tried to reset the temp to 72°and the heater is showing 82° each time. Note that per thermometer, the water is only 52°. What a piece of junk! Good thing this happened before populating the tank with realize or it would have killed everthing!

Great long lasting heaters! I’ve already bought 3.

For the cost, this is a great option for heating your aquarium. It is durable as it is titanium, however, they do tend to malfunction electronically/ mechanically. I have had the thermometer go out on them. I have also had them stop heating or overheat the water. I have purchased quite a few of these and they will typically last you at least a year or more. Sometimes longer. Again, not bad for the price.

I bought this a year ago for 2 of my oscars in a 55 they’re fully grown now and I’m building a indoor pond for them, I bought this heater a year ago and I still have it and it still works perfectly fine and keeps the water at the temperature you want it to be, warms up from 60° to 84° in about 40 minutes, I just bought another not because the one I bought broke but because the pond I’m building will need 2 this is a good product long lasting best value for your money sleek light weight easy to use

I placed the heater near my wave maker in my 75 gallon tank. The starting water temperature was 72 degrees. It only took a couple of hours to reach the 76 degrees I set on the heater. I really like the temperature read out on the heater itself. It's lit up and easy to read. There's a red light that indicates the heater is on, and a blue light when the water temperature reaches the desired setting. Overall, this heater which is titanium and not glass or plastic seems to be very sturdy and well built.

I wanted to warn everyone about this heater. I had this in a slow moving filter and the cord overheated and caught fire. It should have cycled off. Im guessing it couldnt get the water up to its set temp so it over heated to the point its cord caught fire. It failed at its most basic safety point in my opinion. Do not buy this.

The media could not be loaded. Bought this aquarium heater for my 29 gallon tank. Filled with hose water and the heater read it was 60 degrees F. Overnight, the tank reached 76 (I have it set for 77). I think it went up to 90 degrees, then shot back down to 60 something. Easy to install. Hasn’t moved from where I placed it, even after re-wiring everything and moving stuff inside around.October 28, 2024 - Reaching out to the seller because my heater states it’s at 80 but it’s actually between 76-77. I had it running for hours and I’ve been checking temperature all day. Nothing has changed in my tank. Requesting a new one or buying a whole new heater from somewhere else.