This product works for a while. He kept a good water temperature. The suction cups never worked, but it didn't bother me that much. The temperature is not always kept at the exact temperature. For example I would set it to 75 and it would be 77. Nothing major and nothing to worry about. I used it with a thermostat that kept the temperature to my liking. After a while the tank stopped heating. I tried to fix it but after 2 days it didn't work, I bought another heater. I suggest not The instructions weren't in English (although that wasn't a big deal. Just use google translate. I thought I'd mention it.) and the heater didn't heat the tank well.
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