Yep, gotta go with WW here....ease up on the nutes...I find sometimes even clones want different levels of nutes than their exact DNA sisters....I attribute this for slight differences in my soil from pot to pot....mix as I may, they never seem to be exactly the same, or they don't change exactly the same as I go along and add stuff over time. And since you don't know what your ph is, you need to find out and start ph-ing water and soil and keep an eye on it....it changes constantly, even in soil, due to multiple factors, but mostly cuz it's a small amount of soil and we're usually trying to max nutes. Get a decent ph tester or the strips...btw, I think strips are a PITA! But better than nothing... Get an accurate digital tester and always know your ph's. All is not lost...make the necessary corrections and they will perk back up! Good Luck!