I just wanted to make a thread saying how much I LOVE this heater. It is truly amazing!
I bought one for 25$ including shipping from amazon. I got the 25 watt for my 10 gallon. When I got it, it said it was for up to 7 gallons. I was worried it maybe wouldn't heat it up all the way. I clicked the dial to 78*, placed it in, plugged it into the socket... WOW. Has kept it perfectly 78* at all times of the day and even when it's been 65* in the apartment! I'm so amazed by this heater.
It's funny how amazing this heater is compared to others. The others in the store or online are usually 22-30$. So for the same price you get 10x the quality? LOL. I tried a few other brands and this one surpasses by far.
I love it so much I just purchased 2 more from amazon at 54$ for the two AND express shipping! Should be here in 2 days! With the shipping it comes with it's 48$. (For BOTH heaters.)
If any of you are looking for a reliable heater that you won't have to fidget with or return, get the Eheim Jager!