hey rev , I just got done with your log looking good I also agree with ya that PH was causing minor problems as I have seen & heard lots about PH and wrinkling/crinkling in threads on this forum looks that your adjustment has worked I was also noticing that early on in the pics you posted about the ridges that your plants appeared too be droopy, and most of the time droopy is from overwatering, I was going too tell you,then I realized you were using DWC which I know even less about and didn't know what too recomend too fix it, but you already figured that out and fixed it by adding a extra air pump, your pretty good for a noob.. lol i am a noobi boobi noobi too
I have Jorge indoor/outdoor book its pretty good learned alot from it
just a word of caution before you use any of my advice or anybody else's cross check it thru other sources first.
I learned this the hardway,it sucked! have a great day and a great grow, nice style :thumbsup: