How about a photo? Soil runoff should be between 6.2-6.8 so I'm not understanding your thought about things being in the fives....that's for hydro. I'm not sure if using water with a ph of over 7 will cause you problems or not considering your runoff is in the normal range.

Fert buildup in the medium can cause lockouts as well. Photos would help ALOT.
Weedhound Reviewed by Weedhound on . Need help with nutrient lockout Hope somebody can clear this up for me. I am almost 100% that I have nutrient lockout and that it is being caused by a ph problem. Sorry I don't have any pics to show, but from what I've seen and read, I am sure it is a nutrient lockout. I have 8 plants. 3 of them have burnt tips and edges and turning yellow. 2 of them show an Iron deficiency, and the other 3 look very healthy. The medium I am using is Promix. I water with regular tap water, the ph on the tap water is 7.2 to 7.3. This Rating: 5