becos u can simply measure with canna a+b into 2 litres of standard ec tap water 0.3, 4ml of a+b = 0.9 ph, u can be loose with the range 10 drops of a syringe brings it into range 6.0 - 7.0
u can do alot of things, i was growing in soil once and only had enogh cash for my coco plant nutes, so i treated the soil plant like hydro and got a 3 and a half foot plant< was a lil sickly but still gave me #oz of nice smoke/