I know this is going to sound sick but I dont test or adjust ph anymore.
I used to check it and make adjustments for my cloner but one time I tried it without making any adjustments and my clones rooted like they alway do so I quit messing with it. I think it runs around 6.
For my plants I used Fox Farm and when it was blended my ph was at 7 which is ideal for soil so I never adjusted it.
Now I'm using General Organics and there is no ph adjustment needed.
When I grew hydo I kept my reservoirs at 5.8 and I've used both Hannah and Milwaukee testers. Both were great but I liked the Milwaukee better. Now my only testing tool is a roll of ph test tape that is still in it's package!