Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lasted 2 Months

I bought this product in August to replace my very old filter, and it died in October for no apparent reason. I had done nothing that would effect the filter, and could not get it to start again. One night it was working, the next morning, it was dead. I am very dissatisfied and unhappy with this product, especially one that is meant to help keep your tank healthy!