I have been using TNB natural PH Up which is simply Potassium Hydrogen Carbonate in powder form. It only takes a small amount and supposedly safe for the microbes. When I occasionally add light nuits it tends to drop the PH considerably so 1/16 to 1/8 tsp brings up to 6.5. So far has worked fine or so I think as plants look good.
I have the FF "Gringo" whatever pH up and down. I think it's pretty much the same thing but in liquid form. Their pH down is probably citric acid in powder form.
Hint: Everything is 'organic' if you take it down to the molecular level. 100% Iron is organic. Or calcium, or whatever.
Definition of
organic (Entry 1 of 2) 1 a (1) : of, relating to, yielding, or involving the use of food produced with the use of feed or fertilizer of plant or animal origin without employment of chemically formulated fertilizers, growth stimulants, antibiotics, or pesticides
That is the difference between most of the stuff we use and the Miracle Gro compounds of timed release bullshit. The difference is like using ground up oyster shell and letting the plant work for it, or using a chemical to extract the goodies from the same oyster shell powder then diluting it before adding it to water