pH lockin things?

I took some samples and it appears that i have a pH of about 6.8-7.2 or so. I was wondering if this would cause any type of nute lock or not. I have been having some not too serious problems with wilt and leaf curl upward. I do have some pH down maybe I should and 2 or 3 drops/ 2 gal. watering can??

Any tips would be appreciated.

In soil, no, hydro, yes.

i use apple cider vinegar, i mix it into a cup of water and bring the ph down to 3 or so the mix the water into the feed water or resivoir. if you find yourself having to use alot there is probably something in the water that is stopping the water to go down, this is the problem i had with my well water. the ppm's where to high and the ph down solution didnt work well. so now i use a mr clean spot free car washer hose attatchment thingy. the filters work great. brings the ppm's down to 80 or so. also remember tio test the ph after adding nutes because some nutes will bring down the ph too much 6.2-6.7 for soil.

I actually have a "soil tester" and tested about an hour after feeding. I'm just worried about mg lockout i think. I cant figure out why one of my babies is curling and twisting.

Here's a very useful chart