Tap water in the uk comes out at around 6.9 ph roughly. ph for soil growing is 6.8, check out spliffy777, he's just using tapwater without phing, he got a meter from the hydro shop for 40 quid
Hey tech9374, I got one at Lowe's for $10.00. It seperately measures light, pH, and moisture, all at the click of a button. You can also order from Lowe's online.