Hi all. I learned recently if you're growing in organics it is best to have your P.H on a higher scale rather than a lower an example would be 6.8 instead of 6.2 this is because organic soil acts as a PH buffer. But it only can buffer the soil downwards not back up so the time your 6.3 Ph gets buffered by the soil it will be at 6ish whereas if you give a 6.8 the soil will be able to buffer it to 6.2 this is becuase most organic soil buffers itself to 6.2 - 6.3.
So lets say your ph is 5.9 or 6.0 the soil wont be able to raise it back up to its natural state, this is why most people expirence lockouts, nute problems, soil toxicity, salts buildup etc. Because they have given the plant more than 1-2 feedings with lower PH. So if your ph is at 7 leave it. your plant will be happy and will naturally do the job.
The reason why this happens is because most of our key nutrients are taken up by the roots at a P.H between 6.2 to 6.9. For example if your ph is at 5.8 the plants works on overdrive to take up nutrients causing slower rate of photosynthesis this is why you might expirence a plants growth suddenly slow down or stop, An easy way to raise P.H is simply add water with a higher P.H than 6.2, or lets say you have a perfect P.H of 6.4-6.5 and then you add some nutrients to the water and it throws your ph off to lower than 6.2 all you need to do is add more water thats 6.2 and above and you will be able to adjust accordingly.
Hope this helps some people understand PH more, knowledge is life.
Be Kind to it. peace.