So would cheaking runoff be the most acurate way of doing that?

Can you reccomend a good PH tester for under $35 from an online store? THERES no PH stores where i live or near me.

I am not sure of a good Ph tester because i baught a few already that were junk and they are the only ones i can fine so i must go online.

also, once the problem is fixed should they start growing? or may they be stunted for life?