AQQA Submersible Aquarium Heater,75W Fish Tank Turtle Tank Heater with Intelligent LED Temperature Display and External Temperature Controller,for 40-80L Fish and Turtle Tank

The heater sits quietly in the corner showing a digital readout of the water temperature and keeping it perfect for my fish.

Excellent

Seems to do the trick, easy to read in the tank, i would say accuracy in the range of 0.5 or 1 degree which most heaters are in my experience, Ive not found a heater that stays accurate for long. So in my opinon this is as good as any :)

Easy to install in small fish tank. Found temperature adjustment a bit fiddly to set up. Looks good and robust.

The temperature is always spot on, easy to read and change the temperature. I will change all my heaters to these( about 20 )and English plugs

One thing many people ignore when it comes to heating their aquariums is the power of the heater. There are so many small heaters sold as suitable for nano tanks, but they are 50 watts in power. That is far too much for a small tank and this heater is the way to go. I learnt that you base your heater on 1 watt per litre, so many nano tanks would benefit from using smaller heaters.

Woke this morning to find the heater had killed all my fish. For whatever reason it heated the water to over 37 degrees Celsius and showed HH on the screen. Had only just bought some more tetras all were floating on the surface along with other occupants.

Came a little bigger than I expected, works completely different to any other heater I’ve had, nicely hidden behind the plants. Very intuitive to use. Now I need another for my other nano tank!