“After having another 300W brand heater in my outside tank that couldn't keep the tank at an even temperature, I was advised buy the staff at The Tech Den to buy this Eheim 300W heater and within a couple of hours of the heater being in my tank, the water temp was rising to what it was set at and has held temp perfectly for the last few weeks. I was that impressed, I brought another one and swapped out the one in my other tank inside.”
