Uniclife Aquarium Heater 25W/50W/100W/200W Adjustable Submersible Heating Rod with Electronic Thermostat LED Indicator Light and Thermometer Sticker for Freshwater Marine Fish Tanks

I bought this heater for my 10 gallon betta tank, and I ended up having to buy a different 10 gallon tank after using it for a few months, and it's worked well in both. The suction cups are strong, and the heater has never fallen, cracked, or broken. You can adjust it on the tank so it's easily readable, and its dial makes it easy to adjust the heat as well. My fish keeps rubbing up against it, probably because he likes the heat, and so far he's suffered no ill effects from getting so close to it. The heater's accuracy is off by about 3 degrees for me, but this is easily fixable if you have a glass thermometer, which are super cheap and easy to buy. The thermometer that comes with it is also pretty accurate, and you should be fine using that one to tell the temperature of the tank without buying a new one if you want to. Overall this is an excellent heater, and I trust it much more than other heaters that friends have bought for their aquariums. If you want a heater you can trust with your fish, I do recommend this. NOTE: I got the 50W heater for a 10 gallon betta tank, I can't attest to the 25W heater or other versions of this. Make sure you get the right sized heater for your tank!

I use these in my chicken coop to keep the water buckets from freezing and they do great. This is my second time purchasing these in two-ish years, as the first ones broke or stopped working. To be fair though, I really make them work hard all winter as we’re in Wisconsin and see some seriously low temps. This past week it was in the -20’s here and the outside nipples on our water buckets did freeze up, but once brought inside to thaw out this little heater was able to keep the nipples from freezing up for the whole day. I don’t count this as a strike though, because -20 isn’t a match for almost any heater, let alone one not specifically designed to be outside. Under normal winter conditions these aquarium heaters do a great job keeping my water buckets with nipple feeders free flowing and me stress free knowing my chickens are getting the water they need.

I'm yet to find a high quality aquarium heater at any price. This one seems to work just fine but I always connect my aquarium heaters to an electronic temperature controller.

I've bought 2 of these heaters within a year. My first one is still working and is perfect for my breeding tank. It is a little tough to change the temperature at this point since hard water stains got around it. My second one is also amazing. I love these. They are the cheapest ones I could find and they are so worth it. It can be a little off on the temperature sometimes. It'll be on 78 and it shows it's 82. Not all the time which is weird. I love these heaters. They have saved my fish. My loaches loves the suction cups. I have zero complaints on the product.

I struggle to make decisions on aquarium products when I look at reviews. It seems like aquarium products are overpriced and not built to last. I have had this heater for a while. It hasn't over heated or stopped heating like you find in many thermometer reviews. I am happy with it.

This is by far the best aquarium heater I have bought. You can adjust the temperature and, when the water becomes cold the heater will automatically turn hot. When the water becomes to warm the heater will automatically cook off. It is a MUST buy and highly recommend.

It is really good for my goldfish. The heater auto-regulates. It’s such a nice heater and worth your money. It doesn’t heat up fast, it does it gradually. I do recommend testing it in a bowl of water before you put it in your fish tank just to make sure it works properly.

its good for a small tank been using it for over a year still works easy to use durable

It stopped working after a month, so requesting for replacement.. China for a reason ..It stopped working after a month, so requesting for replacement.. China for a reason.. It stopped working after a month, so requesting for replacement.. China for a reason