i have a new problem.. i am trying to dial this sysem in just so for the last month of flower so i am sure i will have new little problem every day.. any help greatly appreciated. also i DO read what others say before i ask but i have yet to find answers to exactly my questions..

the current problem seems to be that the leaf tips are curling down.. can post pics but the end looks like an eagle's claw!!
what could this be?
and i still dont have a PH pen yet i am working on it though

thanks
-J