Instruct: Classify the given review into positive or negative sentiment.
Query: 1/2 a star

It melted through the plastic so I contacted Farm Innovators and they traded it out with another one. Actually, he told me they'd never had this happen before. (??) The new one also melted the plastic on the bottom of the heater but not right away. I was able to use it for about a month and a half which considering the price is really bad. Plus I was afraid the exposed wires could harm my fish. I thought about returning it again but if they are all just going to melt why bother. I ended up going to the local feed store and got a floating tank heater for $14.00 which works great.