How does it reduce the pH?
The unit reduces or increases the P.h. by way of electrolysis.
Just hook it up to your tap, turn the tap on, and when the water starts to flow you can push either 1 of 6x P.h. settings.
2.5, 6.0, 7.0, 8.5, 9.0 or 9.5.
There's 2 hoses, 1 for alkaline water and the other for acidic.
Also has a carbon filter which removes most if not all chlorine from the water which is good for starting off seeds.