No, but yes lol. I'll say no because I didnt fuck with nutrients back in the day & like you I'm not sure. I'll say yes because I read an article saying to do it as some nutes are better absorbed at the 6.0 range and other at 7.0...
I'm trying to find the damn article to send you but I'm having a blond moment (I was up till 5a.m. reading that night) while I'm trying to locate it! Its actually two articles, one about what nute' are absorbed at what end of your ph scale. The other one has basically every nutrient and where they land in regard to up take at where on the scale. It's almost the same literature , the second has way more on their list than the first. The first article was not as long and confusing as the second. It was basically a way for me to fact check the 1st to see if it was some bullie shitt, It was not! I've also asked a few people around the hood and they agreed it was in fact true. A couple people said that low ph runoff is normal. I'm not entirely sure but it seems it's ok to flux the ph between the article & what some have said. One person has a PhD in botany that I asked & the other in biology. I dont really know PhD botany dude like that but I know PhD biology dude really good! It's up too you man, do what you're comfortable with. I'm still going to try and find those 2 articles for you, either way do what you think is best for you! I'm going to be running in ffof with biobizz nutes. And I'm going to run between 6.0 & 7.0. The whole opp.