A 7.5 watt Slim Heater is ideal for your mini or micro tropical aquarium up to 5 gallons in size. Shock proof heater is uniquely shaped to fit easily into a variety of tanks, above or below the substrate. Perfect for glass, acrylic, or plastic aquariums.
I was a little disappointed when I found out this heater does not hold a specific temperature - it heats 5-10 degress above the ambient room temperature. I was hoping for 78 degrees to use in my small fry tank ut it's not going to work. I'm sure I'll use it for something else soon.