Robertsanswered grow question 3 years ago If you are locked out. Means your ph is out of range for nutrition absorption. So first gotta see what ph is in substrate. Need to take a sample of the run off. Check its ph level? Then add a higher or lower ph water till desired ph comes out of bottom. Once you hit your target run off ph then re apply nutrition at right ph to substrate. Good luck and happy growing. Had my share of these issues before. Ph is super important. Good luck 🌱🌱🌱