Review on Hygger Controller Submersible Saltwater Freshwater Fish & Aquatic Pets by Amy Bell

Description says it's for a small aquarium. But I wouldn't call it small, there was only space for a heater. I'm not happy with that. That's accurate to a degree. I have a Beta in my tank so I wanted to keep the temp at 79 degrees but I have to set it at 80 degrees if I want the water to be 79 degrees. I would rather give it 4 1/2 stars because I would consider it less than accurate for a beta grad. But as long as I check it every day with a meat thermometer, which I know is very accurate and two thermometers are always exactly one degree off, I'm happy. So I gave it a 5. I don't have to check it anymore unless I do a water change. And I have to say, when I turn it off to make changes, it heats the water up really quickly, which I find impressive. I can definitely recommend this heater. Just check your measurements first to know if it will fit where you plan to place it.