I was searching for a heater for the pond I built in my yard (the picture posted) (pond is 4ftx3ft with a depth of the deepest part being 4ft and the shallowest being 2ft)So I am a new resident to North Carolina, a CA native, so when I built the pond I didn’t take into consideration how cold the winters here got so I never planned to need or have a heater.Once I put some small fish in my pond, and once 3 large frogs moved in, I came to think of the cold months approaching and decided to buy a heater.After searching through Amazon, I was surprised how much of an eye sore many of them where, most being large bright red floating balls. I was also surprised that heaters for large ponds are a dime a dozen while small pond heaters aren’t much of a thing, with the lack of options I even started considering a larger indoor fish tank heater to use ( but decided against it knowing its a bad idea to use an indoor electronic outdoors)Thankfully I found this heater ! I will admit, I was skeptical due to the price difference from this one compared to most others, as this was the most budget friendly. I also took noticed how much it looked different than the others, this one is submerged while others float atop, but I personally liked the idea and look of this one better, due to my pond being small, anything floating on top would take up a lot of the space.Despite my skepticism, I purchased it anyways and put it to work.I intentionally took my time before leaving a review as I wanted to ensure the product worked for awhile and not just for the first month. So I purchased and had this item delivered on August 17, 2024, I am leaving this review Jan 22, 2025 -and this heater is still functioning as I need it too!This winter has been the COLDEST here in years, I live in an area which typically doesn’t have snow fall but in December we did and again we did it January. I was concerned that if the heater itself didn’t stop working that maybe the cords may malfunction from such cold (if even possible) but that had not been the case.Despite it being 18 degrees outside right now as I type this, I went and dipped my hand in the water and it felt nice, definitely not cold, not hot, but warm, definitely the warmest water outside I know that.I have 2 large female frogs who have made the pond home last summer (carpenter frogs) and one small male carpenter frog, typically carpenter frogs (like most frogs) would overwinter during the cold months, hibernating at the bottom until it gets warm again and I fully expected that to happen, but to my surprise the two females have chosen to stay active these cold months, though I haven’t seen them outside of the pond, I see them on a regular basis floating on top until the dart to the bottom when they see me, so that alone shows how the heater is keeping the water warm -warm enough for the frogs to opt out of overwintering.All my fish are also choosing to not overwinter, 4 gold fish and a ton of little minnows, all living their best life in these ice cold months. The pond has never froze on the top, and I chose to not unplug the pump for winter since that’s how oxygen is circulating which is needed for everything to stay alive, and that as well has not been an issue since the heater has kept the water consistently warm, the pump has not had the chance to freeze up at any point.I was very worried about the heater giving out at some point, as that would cause a ripple effect by allowing the pump to freeze therefore not oxygenating the water, as well as the top of the pond to freeze over, all which could potentially lead to all the life’s in the pond dying which would be not only sad but traumatic so I’m so grateful that has not been the reality and this heater has came through as needed and expected. I would 110% recommend for anyone with a smaller pond