Instruct: Classify a review as either positive or negative.
Query: Piece of junk

If there was 0 star, I would rate this garbage 0 star. I don't know what the previous reviewer got. The one I got was useless. It doesn't clean the water at all. I will throw it into garbage if I cannot return it or the shipment is too much. Never buy it or you will regret, just like me. I bought it because the previous reviewer rated it 5 stars. Perhaps s/he got a different thing.