Review on 🐠 Penn-Plax 75 Watt Fully Submersible Aquarium Heater: Accurate Heating for Up to 15 Gallon Tanks by Lisa Smith

I bought a 300W heater at the end of March, officially it doesn't work at the beginning of July. It was more than I expected but I have a 55 gallon tank so it's not a big deal. Lies on the side. My house is pretty cool 60*-65* so I had to keep the heaters higher and higher to get it up to 78*. I actually had to add a small heater to help. This worked until about a week ago. I have the heater on full temp and the water is still 69*. It's behind a rear window so I'm out of heat and need it for my baby turtles right away. I wouldn't recommend it unless it's a small tank.