Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

Alright, fellow fish fanatics, gather 'round because I'm about to spill the tea on this Mini Aquarium Heater. I've got a 5.5-gallon tank that's basically the underwater equivalent of a studio apartment in NYC—cozy, but every inch counts. Finding a heater that doesn't turn my tank into a tropical hot tub has been a JOURNEY. But this little heater? Oh, honey, it's the Beyoncé of aquarium accessories.First off, let's talk consistency. This thing is like a Swiss watch, but for fish. I swear, it's got my tank water chilling at a solid 80°F. My fish are practically doing the tango, they're so happy with the stable temps. I even caught my snail giving it a little nod of approval.And the thermometer sticker? Okay, it's not exactly NASA-level tech, but it gets the job done. Plus, it's idiot-proof, which is crucial because, let's be honest, sometimes I feel like I'm just winging this whole fish-keeping thing. I stuck it on, and now I can glance over and make sure my aquatic pals aren't boiling or freezing.So, if you're tired of playing thermostat roulette with your fish tank, do yourself (and your fish) a favor and grab this heater. It's reliable, easy to use, and might just make you the coolest fish parent on the block. Trust me, your fish will thank you. They might even start paying rent. (Okay, maybe not, but a fish mon can dream, right?)

This was perfect for our travel tank. We took our beta fish with us on our camping trip and he didn't seem to mind the difference. The heater worked and held a steady 78 degrees the whole time. The price is perfect for a travel tank scenario. I would recommend this one to anyone with a smaller tank or traveling with their pets.

My wife has a couple of three to five gallon aquariums that she has show guppies and amano shrimp in one and an outstanding betta in another and keeping the temperature at the correct point consistently is very important. We've compared them with manual thermometers and they are very accurate. They are solidly built and very simple to slide down into the space where the pump and filter are and they stay in place nicely with the included suction cups. There's no fiddling with a manual thermostat - just plug and play, as they say. We've used these for years and definitely recommend them.

Didnt have the suction cup to hold it in place,otherwise its good.Love that it adjusts temp itself.Easy to see the red/green light to know its working.Came with a temp strip to stick on the aquarium.

Perfect little heater for the price. I love that it has red/green lights to let you know its working. It is pre set at the perfect temperature for our betta so it gives us peace of mind. We have it on a 3gall tank.

I have a DaToo magnetic algae scrubber that I really like so when my old heater started RUSTING I needed a new one, and found this one for a whopping less than $7. I had a 50w before, but my tank is only five gallons so I opted for the less powerful 25w and it does the job easily. I set it up next to the filter flow so it heats evenly. For the price you really can’t beat it.

As most of you know a heater is a necessity for most if not all aquariums and I recently got into fish and wanted to start off easy so as a beginner does I got myself a betta. My tank is 5 gallons and full of live plants and my betta is thriving. The heater heats up surprisingly well and it comes with a preset temp already so no need to haggle with the heater at all just plug and place into your aquarium. It doesn't take much space and it indicates when it's at the ideal temp with a green light. I would rate this a bit higher but I did recieve mine without a suction cup but have ordered a replacement but besides that would reccomend.

Works good for my 3 gal tank, just does not stick to the tank very well.