Instruct: Classify a review as either positive or negative.
Query: Failed after one year

Have noticed that my aquarium began running with Temps. in the 82-84 degree range. Heater light was never on so I believed that it was not the problem. Decided at one point to change my substrate. When my hand brushed up against the still submerged heater I noticed that it was very HOT and the indicator light was NOT on. Removed the heater immediately and the tank temps are now at 78 Degrees without any heater in the aquarium. Clearly a dysfunctional heater. Could not recommend to any serious fish keeper.