Google changing soil ph lol every article you read will tell you this. And then scour the forums for a while.
I used to have soil ph problems. Then I started implementing dolomite lime at 1tablespoon per gallon of soil. I recently cut back to 1/2 tablespoon to gallon of soil. I run promix bx and I also add 3 tablespoons of bonemeal to my plants when I pot them into their Final flowering pots for an added phosphorus boost for weight.
Since adding line to my soil I have yet to hit a ph problem or nute lockout issue with my plants.
Before I was battling problems and buying all kinds of supplements to try and correct issues with plants and I solved it all for 4$ in sweet dolomite lime and an extra two minutes in mixing my soils.