Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed...Again?

I have used this product three (3) times with similar results. Small, almost negligable reduction in Phosphates. Certainly not worth the cost or effort. One Pool Technician told me not to worry about phosphates as long as you keep your chlorene levels reasonably high. Lots of psyco-chemical chatter stating that phosphates feed on algae and you need this chemical and that chemical but my sense is spend the money on chlorene and don't worry about the phosphates.