for soil i run sunshine #4 with worm castings. i also brew an alaska humisoil tea but i use house and garden 2 part soil nute. so i'm partially organic. i could switch to canna but organic nutes in a bottle seems like an oxymoron to me and i know h&g so i've just stuck with them. i've also run their coco lineup in b-cuzz coco with great results. i just like a soiless medium better.
i have a bluelab soil pH meter and it works great. i never bought into testing pH runoff. not sure why. i did some reading on the subject and it seemed that testing the runoff was not entirely accurate for a number of reasons. i really don't have many pH issues ever since i started using teas. they seem to keep the pH fluctuations to a minimum. i used to use lime but since i sitched to humisoil tea my pH has stabilized. i follow a feed, tea, feed, tea schedule. if you are chasing pH though then dolmite lime will definitely help. just remember to dial back or remove your cal/mag as lime contains both.