Thanks guys. Ran out today and bought some PH down for my water and will aim for 6 from now on as all the threads and farmers appears to be having that as a 'best practice' that produces real results:)
...yeah man, you don't mention what style of grow you run but i run coco hempy's and i feed KISS style with nothing but Jack's Pro Hydro and their calcium nitrate as my nutrient line, ...anyway, i don't bother with my ph pen anymore and so now i only use a drop test kit and with this i shoot for piss yellow and call it a day.
...and there is no 'best' ph, per se, meaning that if you grow in soil your target ph should be around 6,5 - 6.8 and if you grow in hydro or soil-less hydro like coco or
promix your target ph should be closer to 5.5 - 5.8.
...something else worth noting is that the elements in your nutrient profile are taken up by the plant at different rates and some of this is controlled by ph, in other words a little variation in your ph is a good thing and will allow your plants easier access to the full nutrient profile.
...that's how i understand it anyway, i'm no expert, just a dedicated stoner with an abiding need and almost a decades practice.
...my point being that you should also be digging into old threads and maybe exploring other forums, this hobby isn't new bro so any problem you may run into will have been covered MANY times over the years so trust the advice you get from guys like me and those other posters in this thread but also verify it independently from other sources, the more proactive you become the faster you will get a real handle on this wonderful hobby.
peace, bozo