Aqueon Submersible Aquarium Heater, 300 Watts, Up to 100 Gallons

The Aqueon Submersible Aquarium Heater is a popular choice for aquarium owners looking to maintain the optimal temperature for their aquatic pets. With a wattage of 300, this heater is suitable for tanks up to 100 gallons in size. It features a thermostat with a temperature dial that allows users to set the desired water temperature between 72-82 degrees. While some customers have had positive experiences with this heater, others have reported issues. One common problem is that the heater fails to heat the water effectively, even when the red indicator LED is on. This can lead to water temperature fluctuations and potentially harm the fish. Additionally, there have been cases where the heater stopped working altogether after just a few weeks or months of use. Another concern raised by a customer is the electrical shielding failing, which resulted in the death of their fish. This suggests that the reliability of this heater may be questionable, particularly for outdoor use. It's worth noting that some customers have found success with this heater, stating that it effectively maintains the desired temperature in their tank. However, the mixed feedback indicates that there may be some quality control or reliability issues with this product.