We are no longer carrying the pH meter for the "Starter Pack". The reason is our cost has doubled on the pH meter.
We recommend you buy the "0II-YS Natural Adjuvant" and buy your own pH meter.
You will also need to purchase one pack of "Citric Acid" to use with the adjuvant.
This is the pH meter we recommend - https://a.co/d/gDndcuL