Orlushy 25W Small Submersible Aquarium Heater, Constant Temperature Betta Fish Tank Heater of 78℉for 1-6 Gallons Freshwater & Saltwater Tanks

Its a really good lil heater i bought it about 3 months ago and my betta loves sleeping on it for some reason. Also dw it wont burn your fish to a crisp bc like i said my betta likes sleeping on it instead of the plant leaves so if you have a betta with no place to sleep i suggest you put the heater as close to the surface as possible and make sure its still completely submerged like the instructions suggest and maybe your betta might like sleeping on it. Also when my idiot brother didnt take care of his betta about half the water evaporated outta the tank and he never topped it off so the heater was sticking out like a sore thumb so when i took his betta (bc hes so irresponsible) i actualy saw the heater was STILL WORKING! even tho it wasnt even in the water and it was still plugged in the wall all that time, it never even burned out or over heated. Pretty good lifespan considering it was halfway out of the water for about a month or 2 idk bc my idiot brother neglected the poor betta for who knows how long (Dw guys the betta is in safe hands and dw they arent sharing the same tank or even near each others tanks) I rate 5 stars for how long it lasted, its pretty cheap price and also that my betta thinks its very comfortable to sleep on. My betta loved it and even when i took my brothers betta i put together a new tank and let it cycle so while it did that i had to put his betta in a tupperware with that heater and i actualy caught his betta sleeping on the heater to so this is essentially a heater and a bed for bettas! ill put an image to show you my brothers previous tank with the heater in it to show you it was still working even tho it wasnt completely submerged for about a month or 2. Even if it breaks ill most likely buy another one from this seller bc of how cheap and hardy they are, it already lasted a couple months out of water so i doubt it will break anytime soon and my heater is already 4 months old and doing great so id say these are pretty good quality heater for the price they are selling for and also very comfortable for both of the bettas to sleep on bc of the plastic guard that wont cook them but rather keep them warm at night!

Very reliable and kept the smaller tank at a perfect temperature. Great for betta fish!

Fine in the water, but when I originally turned it on I was filling up the tank and it got so hot so fast the plastic started warping and melting. I let it cool then put it in the water and that’s my fault it was out but wish it hadn’t warped like it did.

Great little inexpensive heater. I added this to a small 2.5 gallon shrimp tank and it's working great. No manual adjustment, which is fine. I will say it does struggle sometimes on incredibly cold days (it's in the basement and it's in a room that has the door shut 24/7 and no heat supply, so its always about 60 degrees ambient in the winter) but by that, i mean it might drop to 76 degrees or so for a few minutes. The compact size and clean, simple aesthetic is what really made me choose this one specifically, and I don't regret it. I will definitely buy another of these next time I'm in need for a small heater.

Easy to install. It says that it has a set temperature, but the water temp is slightly higher, but on the high end of the safety zone. Still a good buy for smaller tanks.

This is the perfect lil' heater for my 5 gallon betta tank. I've tried the other brand heater that rhymes with tiger, and was dismayed to find that it flashed an "error" display exactly one year to the day after installation. Looked it up, found out that was its termination notice. Can't risk keeping it in the tank after that. Back online to search for a replacement, no "tiger" brand ever again, though. My Orlushy however, continues to function perfectly at 18 months in. It may be an exaggeration to say that I love this heater, but any fishkeeper will understand the joy you experience when an important component of your aquarium setup works as promised, no glitches, no catches; happy and healthy fish! That earns something pretty close to love, IMO.

Th heater seems to do well for our fish tank and is nice and small for the size of tank. It was easy to setup and a good price for what we need it for.

This heater seems good. The suction cup works really well and it is a decent size for my 5.5 gallon. However, after about 3-4 months it just stopped working correctly. The temperature keeps reading differently to the heater. At one point it was reading 74 degrees as the 78 degrees it was supposed to be at and really hurt my fish. When I caught it, I had to put in my backup heater. I'm using this heater again to start up a new tank and it is now heating a few degrees above 78 degrees. Temperature fluctuations are super bad for fish, and even that 4 degrees difference made my fish very ill within the span of a day or so. There is no way to reset the heater's sensor or set temperature either. Also, the black ridges on the heater part look cool, but collect so so much algae. There are better options on the market.

Works great for my 3-gallon betta fish tank. It has a small light; when it's working, a red color lights up. It's cool as it gives some light during the night for my betta fish. must buy

My betta loves the heater, always he rest just above the heater. Keeps the temperature very well and steady and it’s small then don’t occupy too much space.

I was unfortunately unable to test the heater as it was partly melted for an unknown reason and also dirty. Therefore I did not want to plug it in. This is what it looks like, hopefully this picture will be helpful to anyone who is lucky enough to receive a product that is usable.

So far the little heater working The temperature sticker as a lot of others say is a dud made to not work do not stick it on your tank will write another review if functionality changes