GERUIUSB Aquarium Heater 10 W Mini Aquarium Heating Rod with Thermostat, Thermostat Aquarium Turtle Heater for Small Aquariums for Salt Water and Freshwater

Been running non stop for nearly half a year and still going strong, simple to use. Great for sea monkeys

This doesn’t even heat a 2L bowl of water for changing the tank. I returned waste of time and money

This mini USB aquarium air pump is a compact and efficient solution for oxygenating small to medium-sized fish tanks. It runs quietly thanks to its electric ceramic motor, making it suitable for home or office use. The USB power option adds great versatility, allowing it to be used with power banks, car chargers, or computers, making it ideal for portable setups.Despite its low energy consumption of just 1W, it delivers a steady airflow, ensuring fish receive adequate oxygenation. The included air stone and silicone tube make setup simple, and the lightweight design makes it easy to attach or transport. A great choice for aquarium enthusiasts looking for a silent, energy-efficient air pump.

Lovely little heater arrived on time just the right size

This really struggles to increase the temperature of my 19l tank by even a single degree. If the water is already warmish then it does seem to help that warmth persist for longer than without the heater. I've had it about a year though and it's still operational... which is somewhat impressive for aquatic electronics in this price range. It would probably be more useful for something like a 10 litre tank.

I ran a test with this in a small jug of water and it did seem to work - it isn't fast, but it'll do the trick for a very small quarantine tank, or for long journeys.

keeps my 1 gallon aquarium at a consistent 26c which is perfect for my needs!

only one star as it never arrived, i have since purchased from another outlet and i would say dont bother it would not heat an egg cup... its tiny so that stands to reason but its not worth the money if you are trying to heat even a Beta tank ......1 Star