Review on ViaAqua 200-Watt Quartz Glass Submersible Heater: Ultimate Temperature Control for Aquatic Environments by Susan Park

I overdid it a bit and got 200 watts (expected increase) for my 10 gallon tank. It floats above the gravel line and the waterline indicator and waterline in my tank are perfect. I've been using it for a week and it seems to be doing a great job of keeping my betta tank warm this winter. If all hell breaks down and the heater goes wrong I will update my new review. So far, so good! Update: Everything is going well! Switched to a 20 gallon tank and still great! He's amazingly strong. I screwed it up and left it on while decanting the tanks so it was piping hot when I poured ice cold tap water in. No glass explosion, just lots of steam and hiss.