hi guys; I had high pH (ps its small p, big H- don't let
@Dr. Babnik catch you typing it any other way).
I had cause to lower my pH recently cos I added too much lime to my mix; I had lemons to hand and was amazed at how much I could bring down the pH of my water/feed;
10 litres went from 7 to 5 with just one lemon. I have also used cider vinegar and found that a dessertspoonful did about the same.
To be more precise, of course you will need a pH tester.
I did some research on both (nothing scientific-just Googling) and discovered there's lots of other goodies in lemon juice and probably good cider vinegar too;
potassium for one, but whether its the right kind or available I don't know, but I suspect Dr.B will have something useful to add.
I am in soil so adding nutes in the form of lemon juice/cider vinegar wont throw me too much but perhaps if you are hydro then additional nutes might upset the balance.