Maybe water has some nutes that burned them?Calcium etc...
I found this link on wikipedia. It says: lower leaves show signs of P deff BEFORE the rest of the plant, and thats exactly what happened to them. Still i need to know whats wrong :P
Phosphorus deficiency - Wikipedia, the free encyclopedia

GOD i wish i were an agronomist sometimes...
Kmakok Reviewed by Kmakok on . FINNALY!!! My troubleshooting form is filled!!! HELP! S=Traditional Soil E-indoor E-Soil E-Plain Soil Mix CSL-Soil with Wormcasts (18%) + 80 soil + 2% rice E-Tapwater E-6.9 Water pH HRT-Source water EC (if hydro) E-2.5 months E-No fertilizer, yet. I used some N while they were vegging Rating: 5