Review on 🐠 Adjustable HITOP Submersible Aquarium Heater: 100W/200W/300W/400W/500W, Suitable for Large Fish Tanks up to 150 Gallons, Includes Sturdy Protective Cover and Thermometer for Optimal Performance by Chrissy Ramirez

First off, great box. And the suction cups are cool (better than a vacuum). And a heat shield is a great idea, except it prevents heat from escaping and fish can still swim inside. Then it rolls down the slope like a giant poop. Couldn't warm up 75 ended up getting pissed and put the filter hose through the coffee pot. Now it's a heater. Jk, but it was very tempting. However, I have to say that it works great on the 10 gallons we pushed it to.