Product review (1 stars): 2- 7 is neutral and what you want- these Garbage "filters" RAISED my ppM
If i could give a zero start i would- DO NOT BUY THESE "filters"  My water from the tap is 75 PPM with a PH of 7.2- 7 is neutral and what you want- these Garbage "filters" RAISED my ppM, to 180 PPM!!! and the PH to 10!!these are NOT filters these are softeners!!!  these is fraud and no acceptable-.  what are these filters adding to my water that I drink?  who knows?  They are water softeners and not filters- do not waste our money- its a rip off. Amazon should not be selling them- its a scam.