Ordered because I wanted a heater for my 5 gallon tank that I could adjust. I didn’t read all the reviews. My experience was similar to most of theirs. I set the heater to 79 and went to bed. Next morning I found it had heated to 84. First, I adjusted it to 75, but it still wanted to turn on. So, I unplugged the heater and waited several hours for the water to cool down to 79. Then, I turned the heater setting to 68 and plugged it back in. Over the course of 2 hours, I turned up the heater setting a degree or two until I knew it was keeping the water a consistent 79. That setting, for me, was 75. For looks, I love it. It’s slim and modern. Price was great. But, just be aware of it’s possible issues and keep an eye on it until you’re confident it’s working properly.
This aquarium heater worked great for a few months. The design and appearance are great, but after a while I noticed that even if I had it on its lowest setting (68) it kept my tank was stuck at 82 degrees F... didn't hurt the fish at all, but had I owned fish that enjoyed a slightly cooler temp, I would've been in trouble.
My experience with this product was very DISAPPOINTED after buy 4 units "1 per aquarium" fully submerged in less then 2 months 3 units just burn . I call the manufacturer and they have a only 30 days guaranty. And the last unit is a PAIN,,NEVER KEEPS THE RIGHT TEMPERATURE,,NOT A RELIABLE BRAND!!!!!
Sad they seem to be phasing them off of Chewy. They are all I use and so far they always seem to maintain the correct temps.
Keeps my betta’s 5-gallon Fluval tank at 78 degrees without the need for adjustment and fits inside the back compartment with the filter motor.
Went through 2 in about a year, they power on but around 6 months you will see burnt spots on heater glass and it won't heat the water anymore.
It’s a great heater for small tanks, and the best part is that it’s adjustable which is hard to find in small heaters.
Got two of these the other day to replace the old ones I had(different brands) and suddenly they both stopped working. Both are in separate tanks and both tanks have dropped back down in temps...
I had heater turned as low as possible and it still registers 86 degrees. 16 degree difference. If you love your fish please don't buy this heater. I switched to the tetra which has never let me down.
I bought two of the 25 watt heaters for my 3.5 gallon Betta tanks. It's difficult to find a good, adjustable heater for a small tank. It did take a couple days to get the water up to 80 degrees, but that's probably because I keep my home on the cool side (66-68 degrees) in the winter. I've only had the heaters a couple weeks, but I'm very happy with them. The only thing I would change is there is no indicator light to show when the heater is on.