for our Ph Tester, generally we offered PH4.00, PH6.86, PH9.18, powder 3 packets for each unit. Pls take a look our package photo, yo will see it what look like:
for our Ph Tester, generally we offered PH4.00, PH6.86, PH9.18, powder 3 packets for each unit. Pls take a look our package photo, yo will see it what look like:
