Product review (1 stars): Don't waste your money, they are liars!!!!
These filters are a scam. I sent a water sample to doctors data to see How well these filter out heavy metals and flouride, turns out aluminum was high in the caution zone there was still some  flouride and there was uranium which was also in the caution zone. They say the filters last 6 months, these were only used for 2 months. For the money I spent on this I could have bought a reverse osmosis system.