Fluval E 100Watt Electronic Heater

I have had this for months, liked it so much purchased another one.

This is my favorite aquarium heater. I love that the temperature is easily read. I bought it for my 55 gallon tank.

Surprisingly accurate for a single-unit heater/thermometer. Stuck it in my 15 gallon Fluval Flex and it has worked perfectly.

Easy to read colors tell you when its too cold / too hot or just right !

Works great, heats my tank very evenly. I do unplug it in the summer, as the room tends to heat the tank warmer than I have the heater set, and I get tired of the overheat warnings (red LCD screen). I have 2 other thermometers in my tank, and this consistently reads 2 degrees cooler than those thermometers. That is annoying, but not a big problem since it is consistent with its temperature readings.

This heater is massive for the actual heating power it is giving you, and really impacts the aesthetic of any tank you want to put it in. I have to fit it really awkwardly for my 20 gallon long because it's just too big to fit normally.