opfreak

Please help, just bought these filters for my master spa. They just came in the mail, while the outside box looks real. The filter not only says eco pur on it, but also has placeto on the top of it, and a placeto band. the number on the top of the filter says pma-ep1. Did I get ripped off? please help, the spa came with the house, and I do not have a minieral filter to compare it too.