Ph buffer solution preferance

[xcrispi]

But it thought you have to calibrate every 3 times? That means i need to stock up on 8 oz bottles? throw them out after one use?

Hell no bro.
Im so tight I squeak . I pour a tiny ass lil bit in the corner of a sandwich baggy and stick the meter in the baggie . Don't go and contaminate the whole bottle for 1 test .
Peace
Crispi :stoned: